Laravel generate the routes using Route::resource need to add prefix /admin/
If you need prefix for a multiple routes, you should use route group:
Route::group(['prefix' => 'admin'], function(){ Route::resource('books','Admin\BookController');});Or, if you need to use just one controller, you could just do this:
Route::resource('/admin/books','Admin\BookController');
Just to add to Alexey's Answer. I'm using Namespace too with group. Below is the example.
Route::group([ 'prefix' => 'admin', 'namespace' => 'Admin', 'middleware' => 'admin.routeNeedsPermission:view-admin-management',], function() { Route::resource('books','BookController');});By that way you don't need to write admin in all your routes.