The Magical World of Andrew Bennett.

Hunter of cursed books and forbidden grimoires, Andrew Bennett comes to town following a series of violent murders the police can't solve. With his mysterious magical doorway and the help of the local inspector Hobbs, Bennett chases down the hidden mastermind behind the murders. It's soon discovered that dark magic rituals leads to a much more sinister and world-ending plan. Can the doorkeeper solve the mystery before it's too late?