Tormented

"The insidious secrets within the halls of Arlington Asylum are slowly revealed, and it is beyond anything Adrian could have possibly imagined. A literal hell is unleashed as impossible and terrifying creatures indulge their sadistic desires. Adrian and his friends must escape this nightmarish place and warn the outside world before it's too late, but they must face down the demons of hell to do so. -- quoted from this book's product page on Amazon.com as of 2018-06-01.