public function index()
{
$books = $this->bookRepo->getAllPaginated(10);
$recents = $this->signedIn ? $this->bookRepo->getRecentlyViewed(4, 0) : false;
$popular = $this->bookRepo->getPopular(4, 0);
$this->setPageTitle('Books');
return view('books/index', ['books' => $books, 'recents' => $recents, 'popular' => $popular]);
}