diff --git a/app/controllers/admin.php b/app/controllers/admin.php
index cc3e3385fc24056abc1e833bb4c19dbdf6c9c1ab..ff4060eeeef9a90186e2079a4fc06118c4f4d42b 100644
--- a/app/controllers/admin.php
+++ b/app/controllers/admin.php
@@ -75,6 +75,8 @@ class Admin extends Controller {
                 }
                 
             }
+            $data['book'] = $this->model('BookModel')->getAllBookAdmin();
+            $data['author'] = $this->model('AuthorModel')->getAuthor();
             $this->view('admin/bookadmin', $data);
         } else {
             $this->view('error/404');
@@ -87,13 +89,9 @@ class Admin extends Controller {
                 $newPassword = $_POST['newPassword'];
                 $data['user'] = $this->model('UserModel')->getAllUser();
                 $array = array_column($data['user'], "username");
-                // Cek stringnya kosong ato g
-                if(empty($newUsername) || empty($newPassword)){
-                    var_dump($newPassword);
-                    $this->view('admin/useradmin', $data);
-                }
-                // Cek exist ato g usernya
-                if (!in_array($newUsername, $array, true)){
+
+                // Cek stringnya kosong ato g && exist ato g usernya 
+                if (!(empty($newUsername) || empty($newPassword)) && !in_array($newUsername, $array, true)){
                     $this->model('UserModel')->insertUser($newUsername, $newPassword);
                 }
             }
@@ -118,16 +116,8 @@ class Admin extends Controller {
 
                 $data['book'] = $this->model('BookModel')->getAllBook();
                 $array = array_column($data['book'], "title");
-
-                // Cek string kosong ato ga
-                if(empty($newTitle)){
-                    $data['book'] = $this->model('BookModel')->getAllBookAdmin();
-                    $data['author'] = $this->model('AuthorModel')->getAuthor();
-                    $this->view('admin/bookadmin', $data);
-                }
-
-                // Cek title udah ada atau belum, atau emang gk diganti
-                if(!in_array($newTitle, $array, true) || $newTitle === $oldTitle){
+                // Cek title kosong atau udah exist di db atau gk diganti
+                if(!empty($newTitle) && (!in_array($newTitle, $array, true) || $newTitle === $oldTitle)){
                     $this->model('BookModel')->updateBook($bookid, $newTitle, $selectedAuthor, $newContent, $selectedCategory);
                 }
 
@@ -152,12 +142,8 @@ class Admin extends Controller {
                 // Bikin kolom array list username buat pengecekkan
                 $array = array_column($data['user'], "username");
 
-                // Cek stringnya kosong ato g
-                if(empty($newUsername) || empty($newPassword)){
-                    $this->view('admin/useradmin', $data);
-                }
-                // Cek ada di db ato g + cek kalo usernamenya gk di edit, berarti password doang
-                if (!in_array($newUsername, $array, true) || $newUsername === $oldUsername){
+                // Cek password kosong dan user kosong atau udah exist di db atau gk diganti
+                if (!(empty($newUsername) || empty($newPassword))  && (!in_array($newUsername, $array, true) || $newUsername === $oldUsername)){
                    $this->model('UserModel')->updateUser($userId, $newUsername, $newPassword);
                 }
 
@@ -173,21 +159,22 @@ class Admin extends Controller {
     public function addAuthor(){
         if (isset($_SESSION['user_role']) && $_SESSION['user_role'] === 'admin' ){
             if ($_SERVER['REQUEST_METHOD'] === 'POST') {
-                $newAuthorName = $_POST['newAuthorName']; // Assuming you have an input field for author name
-                // Additional author-related fields can be added here
+                $newAuthorName = $_POST['newAuthorName']; 
+
     
-                // Check if the author already exists in the database
+
                 $data['authors'] = $this->model('AuthorModel')->getAllAuthor();
                 $authorNames = array_column($data['authors'], "author_name");
-    
-                if (!in_array($newAuthorName, $authorNames, true)){
-                    // Insert the new author into the database using your AuthorModel
-                    $this->model('AuthorModel')->insertAuthor($newAuthorName); // Adjust this according to your model's method
+                
+                // Cek exist atau kosong
+                if (!in_array($newAuthorName, $authorNames, true) && !empty($newAuthorName)){
+
+                    $this->model('AuthorModel')->insertAuthor($newAuthorName); 
                 }
             }
-            // Fetch the list of authors (optional)
+
             $data['authors'] = $this->model('AuthorModel')->getAllAuthor();
-            $this->view('admin/authoradmin', $data); // Adjust the view file and path accordingly
+            $this->view('admin/authoradmin', $data); 
         } else {
             $this->view('login/login');
         }
@@ -196,17 +183,17 @@ class Admin extends Controller {
     public function editAuthor(){
         if (isset($_SESSION['user_role']) && $_SESSION['user_role'] === 'admin') {
             if ($_SERVER['REQUEST_METHOD'] === 'POST') {
-                // Get values from the input form
-                $newAuthorName = $_POST['newAuthorName']; 
 
+                $newAuthorName = $_POST['newAuthorName']; 
                 $oldAuthorName = $_POST['authorName']; 
 
+                $authorid = $_POST['authorId'];
+
                 $data['authors'] = $this->model('AuthorModel')->getAllAuthor();
                 $authorNames = array_column($data['authors'], "author_name");
-    
-                if (!in_array($newAuthorName, $authorNames, true)){
-                    
-                    $this->model('AuthorModel')->updateAuthor($oldAuthorName, $newAuthorName); 
+                
+                if (!in_array($newAuthorName, $authorNames, true || $newAuthorName === $oldAuthorName) && !empty($newAuthorName)){
+                    $this->model('AuthorModel')->updateAuthor($authorid, $newAuthorName); 
                 }
             }
 
@@ -219,8 +206,8 @@ class Admin extends Controller {
     public function deleteAuthor(){
         if (isset($_SESSION['user_role']) && $_SESSION['user_role'] === 'admin') {
             if ($_SERVER['REQUEST_METHOD'] === 'POST') {
-                $authorName = $_POST['authorName']; 
-                $this->model('AuthorModel')->deleteAuthor($authorName); 
+                $authorId = $_POST['deleteId']; 
+                $this->model('AuthorModel')->deleteAuthor($authorId); 
             }
             $data['authors'] = $this->model('AuthorModel')->getAllAuthor();
             $this->view('admin/authoradmin', $data); 
@@ -228,5 +215,31 @@ class Admin extends Controller {
             $this->view('login/login');
         }
     }
+
+    public function deleteUser(){
+        if (isset($_SESSION['user_role']) && $_SESSION['user_role'] === 'admin') {
+            if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+                $userId = $_POST['deleteId']; 
+                $this->model('UserModel')->deleteUser($userId);
+            }
+            $data['user'] = $this->model('UserModel')->getAllUser();
+            $this->view('admin/useradmin', $data);
+        } else {
+            $this->view('login/login');
+        }
+    }
+    public function deleteBook(){
+        if (isset($_SESSION['user_role']) && $_SESSION['user_role'] === 'admin') {
+            if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+                $bookId = $_POST['deleteId']; 
+                $this->model('BookModel')->deleteBook($bookId);
+            }
+            $data['book'] = $this->model('BookModel')->getAllBookAdmin();
+            $data['author'] = $this->model('AuthorModel')->getAuthor();
+            $this->view('admin/bookadmin', $data);
+        } else {
+            $this->view('login/login');
+        }
+    }
     
 }
\ No newline at end of file
diff --git a/app/models/AuthorModel.php b/app/models/AuthorModel.php
index f259633a63014b15dcf506386084ee9e388641a1..7ca054277d05bdf3c296edc87b8534d30b0334c0 100644
--- a/app/models/AuthorModel.php
+++ b/app/models/AuthorModel.php
@@ -27,9 +27,9 @@ class AuthorModel
         $this->database->bind('authorid', $authorid);
         $this->database->execute();
     }
-    public function deleteAuthor($authorName){
-        $this->database->query('DELETE FROM ' . $this->table . ' WHERE name = :name');
-        $this->database->bind('name', $authorName);
+    public function deleteAuthor($authorId){
+        $this->database->query('DELETE FROM ' . $this->table . ' WHERE id = :id');
+        $this->database->bind('id', $authorId);
         $this->database->execute();
     }
 }
\ No newline at end of file
diff --git a/app/models/UserModel.php b/app/models/UserModel.php
index 64eea7e8423bd2af9daa5a947efaa0d84451f569..33601c7b016843f06a5b828906432b0d0892eab9 100644
--- a/app/models/UserModel.php
+++ b/app/models/UserModel.php
@@ -44,14 +44,7 @@ class UserModel
         $this->database->bind('newPassword', $newPassword);
         $this->database->execute();
     }
-
-    public function deleteUserByName($username){
-        $this->database->query('DELETE FROM user WHERE name = :username');
-        $this->database->bind('name', $username);
-        $this->database->execute();
-    }
-
-    public function deleteUserById($id){
+    public function deleteUser($id){
         $this->database->query('DELETE FROM user WHERE id = :id');
         $this->database->bind('id', $id);
         $this->database->execute();
diff --git a/app/views/admin/authoradmin.php b/app/views/admin/authoradmin.php
index ee2d10b6e1629eb71519c91ac47d9388fee158e3..0d168cfbb01039f879cd990d4a12796d688acdce 100644
--- a/app/views/admin/authoradmin.php
+++ b/app/views/admin/authoradmin.php
@@ -19,7 +19,7 @@
 
     <div class="top-section">
         <h1 class="title">Authors</h1>
-        <button class="add-btn" onclick="openAddPopup()">Add User</button>
+        <button class="add-btn" onclick="openAddPopup()">Add Author</button>
     </div>
 
     <div class="overlay" id="overlay"></div>
@@ -44,16 +44,17 @@
                         <td><?php echo $id; ?></td>
                         <td><?php echo $name; ?></td>
                         <td>
-                            <button class="edituser" onclick="editUser('<?php echo $name; ?>')">
+                            <button class="edituser" onclick="editAuthor('<?php echo $name; ?>', '<?php echo $id;?>')">
                                 Edit
                             </button>
-                            <button class="deleteuser" onclick="deleteUser()">
+                            <button class="deleteuser" onclick="deleteAuthor('<?php echo $id ?>')">
                                 Delete
                             </button>
                         </td>
                         <div class="edit-popup" id="editpopup">
                             <form id="editForm" method="post" action='<?php echo BASEURL; ?>/admin/editAuthor'>
-                                <input type="hidden" name="authorName" value="<?php echo $name; ?>">
+                                <input type="hidden" id="authorid" name="authorId">
+                                <input type="hidden" id="oldauthor" name="authorName">
                                 <div class="add-input">
                                     <input type="text" id="username" name="newAuthorName" placeholder="Enter new username.." required>
                                 </div>
@@ -70,7 +71,7 @@
                                 Are you sure want to delete this author?
                             </p>
                             <form id="deleteForm" method="post" action='<?php echo BASEURL; ?>/admin/deleteAuthor'>
-                                <input type="hidden" name="authorName" value="<?php echo $name; ?>">
+                                <input type="hidden" id = "deleteid" name="deleteId">
                             </form>
                             <div class="add-submission">
                                 <button class="submit-button" onclick="deleteForm()">Delete</button>
diff --git a/app/views/admin/bookadmin.php b/app/views/admin/bookadmin.php
index 8d33f0a29cb71f50c4ca780b5221a10eb37a0f23..ef96e946b3a737230d00556a04874a2a00ddc759 100644
--- a/app/views/admin/bookadmin.php
+++ b/app/views/admin/bookadmin.php
@@ -55,15 +55,15 @@
                                 <button class="editbook" onclick="editBook('<?php echo $title; ?>', '<?php echo $category; ?>', '<?php echo $author_name; ?>', '<?php echo $content; ?>', '<?php echo $id?>')">
                                     Edit
                                 </button>
-                                <button class="deletebook" onclick=deletebook()>
+                                <button class="deletebook" onclick="deleteBook('<?php echo $id; ?>')">
                                     Delete
                                 </button>
                             </td>
 
                             <div id="editpopup" class="edit-popup">
                                 <form id="editForm" method="post" action='<?php echo BASEURL; ?>/admin/editBook'>
-                                <input type="hidden" id = "bookid" name="bookid" value="<?php echo $id; ?>">
-                                <input type="hidden" id = "oldtitle" name="oldTitle" value="<?php echo $id; ?>">
+                                <input type="hidden" id = "bookid" name="bookid">
+                                <input type="hidden" id = "oldtitle" name="oldTitle">
                                     <div class="horizontal-component">
                                         <div class="title-input">
                                             <input type="text" id='title' name="newTitle" placeholder="Enter new title..." class="input-text">
@@ -101,8 +101,11 @@
                                 <p>
                                     Are you sure want to delete this book?
                                 </p>
+                                <form id="deleteForm" method="post" action='<?php echo BASEURL; ?>/admin/deleteBook'>
+                                    <input type="hidden" id = "deleteid" name="deleteId">
+                                </form>
                                 <div class="add-submission">
-                                    <button class="submit-button" onclick=deleteBook() >Delete</button>
+                                    <button class="submit-button" onclick=deleteForm()>Delete</button>
                                     <button class="cancel-button" onclick=closeDeletePopup()>Cancel</button>
                                 </div>
                             </div>
diff --git a/app/views/admin/useradmin.php b/app/views/admin/useradmin.php
index 39ae02b5eb484d0aa5698c37919b285e6ffd736d..c946f0ec251d3547daf1e8f15694a643ba96f1aa 100644
--- a/app/views/admin/useradmin.php
+++ b/app/views/admin/useradmin.php
@@ -46,7 +46,7 @@
                             <button class="edituser" onclick="editUser('<?php echo $username; ?>', '<?php echo $password; ?>', '<?php echo $id; ?>')">
                                 Edit
                             </button>
-                            <button class="deleteuser" onclick="deleteUser()">
+                            <button class="deleteuser" onclick="deleteUser('<?php echo $id;?>')">
                                 Delete
                             </button>
                             </td>
@@ -70,8 +70,11 @@
                                 <p>
                                     Are you sure want to delete this user?
                                 </p>
+                                <form id="deleteForm" method="post" action='<?php echo BASEURL; ?>/admin/deleteUser'>
+                                    <input type="hidden" id = "deleteid" name="deleteId">
+                                </form>
                                 <div class="add-submission">
-                                    <button class="submit-button">Delete</button>
+                                    <button class="submit-button" onclick=deleteForm()>Delete</button>
                                     <button class="cancel-button" onclick=closeDeletePopup()>Cancel</button>
                                 </div>
                             </div>
diff --git a/public/js/authoradmin.js b/public/js/authoradmin.js
index 32a2b799b71256f118cc9f89f59435381bab5538..457007cf3f8e46c3da7247cc08f99dfe7123be1f 100644
--- a/public/js/authoradmin.js
+++ b/public/js/authoradmin.js
@@ -1,7 +1,6 @@
 let addpopup = document.getElementById("addpopup")
 let ol =document.getElementById("overlay")
-const user = document.getElementById("username")
-const pw = document.getElementById("password")
+const author = document.getElementById("username")
 
 let editpopup = document.getElementById("editpopup")
 
@@ -19,8 +18,12 @@ function closeAddPopup(){
     pw.value ='';
 }
 
-function editUser(username){
-    user.value = username;
+function editAuthor(authorname, authorid){
+    const id = document.getElementById("authorid")
+    const oldauthor = document.getElementById("oldauthor");
+    oldauthor.value = authorname;
+    author.value = authorname;
+    id.value = authorid;
 
     editpopup.classList.add("open-edit-popup");
     ol.classList.add("open-overlay");
@@ -42,7 +45,9 @@ function deleteForm(){
     form.submit();
 }
 
-function deleteUser(){
+function deleteAuthor(id){
+    const deleteid = document.getElementById("deleteid");
+    deleteid.value = id;
     deletepopup.classList.add("open-delete-popup");
     ol.classList.add("open-overlay");
 
diff --git a/public/js/bookadmin.js b/public/js/bookadmin.js
index 2b4b46e557a71d1db5d993f0cfbeb8103f77a898..0322f58f3857079683983529755b8762c3a8288b 100644
--- a/public/js/bookadmin.js
+++ b/public/js/bookadmin.js
@@ -55,11 +55,19 @@ function submitAddForm(){
     form.submit();
 }
 
-function deletebook(){
+function deleteBook(id){
+    const deletepopup = document.getElementById("deletepopup");
+    const deleteid = document.getElementById("deleteid");
+    deleteid.value = id;
     deletepopup.classList.add("open-delete-popup");
     ol.classList.add("open-overlay");
 }
 
+function deleteForm(){
+    const form = document.getElementById("deleteForm");
+    form.submit();
+}
+
 function closeEditPopUp(){
     editpopup.classList.remove("open-edit-popup");
     ol.classList.remove("open-overlay");
diff --git a/public/js/useradmin.js b/public/js/useradmin.js
index 5ebf3c126b087f3ac736d17b731d897b0dae313d..9db5267168ee753eb3427ed9cbc01bfa95871632 100644
--- a/public/js/useradmin.js
+++ b/public/js/useradmin.js
@@ -44,12 +44,19 @@ function addForm(){
     form.submit();
 }
 
-function deleteUser(){
+function deleteUser(id){
+    const deleteid = document.getElementById("deleteid");
+    deleteid.value = id;
     deletepopup.classList.add("open-delete-popup");
     ol.classList.add("open-overlay");
 
 }
 
+function deleteForm(){
+    const form = document.getElementById("deleteForm");
+    form.submit();
+}
+
 function closeEditPopup(){
     editpopup.classList.remove("open-edit-popup");
     ol.classList.remove("open-overlay");