As in the blade template to create a link to id it in the middle?

https://laravel.ru/docs/v5/helpers#url-%D0%B0%D0%B...
\rhttps://laravel.com/docs/5.6/urls

It is convenient to use named ranting.
In ranting:

Route::get('аdmin/authors/{author}/edit', ['as' => 'routeName', 'uses' => 'ControllerName@methodName']);

Then get a link like this:
{{ route('routeName', $author->id) }}
Or, if $author - suitable model, even so:
{{ route('routeName', $author) }}

Get the address http://domain.name/аdmin/authors/123/edit