Eaten Alive by Monsters for Immortality

With only months left to live, a cancer-stricken man leaps to his death—only to wake up in a world of monsters hungry for his flesh. To survive, he must outwit demons who believe eating a 'preacher' brings immortality, using nothing but his chemistry smarts and a desperate will to live. Every lie, every scheme, is a gamble: if he fails, he'll end up roasted on their spit.