Laravel - Retrieve specific data from pivot table

Question

I am implemeting a search using Laravel, but couldn't figure out how to get data from my pivot table. The pivot is a many to many relationship between Books and Tags.

The idea here is to search books by tags and display them.

class Book extends Model
{
public function tags() {
        return $this->belongsToMany(Tag::class);
    }
}

class Tag extends Model
{
public function books() {
        return $this->belongsToMany(Book::class);
    }
}

Other search seems to work just fine.

$books = Book::where('title', 'LIKE', '%'.$search_text.'%')
                        ->orWhere('author', 'LIKE', '%'.$search_text.'%')
                        ->orWhere('editor', 'LIKE', '%'.$search_text.'%')
                        ->orWhere('ISBN', 'LIKE', '%'.$search_text.'%')
                        ->orWhere('year', 'LIKE', '%'.$search_text.'%')
                        ->orWhere('language', 'LIKE', '%'.$search_text.'%')
                        ->get();