Query all where list id has user id - Laravel

I'm trying to get all the items, in list(s) where the list has a user id.

Here are my models

Watchlist

public function books(){
      return $this->hasMany('App\WatchedBooks');
    }

    public function user(){
      return $this->belongsTo('App\User');
    }

WatchedBooks

public function watchlist(){
    return $this->belongsTo('App\Watchlist');
  }

Query Gets all books in every list disregarding user ids and list ids

$Watchlists = WatchedBooks::all();

Currently gets all books regadless of userid.

I need all books in all of the users lists.

A user could have multiple lists List A List B

So something like All books from all lists where the list id is related to user id.

This is what the Watchlist DB looks like WatchlistDB

This is what the WatchedBooks DB looks like Books in watchlist

from Newest questions tagged laravel-5 - Stack Overflow http://ift.tt/2pqoxBP
via IFTTT