Fatal error: Uncaught mysqli_sql_exception: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'book_id='293'' at line 1 in D:\webserver\www\vcampus.net\ebooks\ebook.php:27 Stack trace: #0 D:\webserver\www\vcampus.net\ebooks\ebook.php(27): mysqli->query('select category...') #1 {main} thrown in D:\webserver\www\vcampus.net\ebooks\ebook.php on line 27