The Brothers Thanatos

After the ritualistic murder of Max's younger brother, Charlie, the grieving warlock tethers the man's soul to his own to keep it from eternal damnation. He knows the only one who can change that fate is the great Celestial Beast, Lucifer, but finding the devil is not easy. As Max's search plunges him into an insidious world of horrors and fabled societies, he finds a lost girl who might hold the key to all his troubles, not realizing she will bring him far greater troubles than he can imagine.