Petty Pewter Gods by Glen Cook

In Glen Cook’s fantasy novel Petty Pewter Gods, private investigator Garrett becomes entangled in a supernatural turf war between fading pantheons in the city of TunFaire. The narrative follows Garrett as he is coerced by various deities—most notably the Shayir and the Godoroth—to recover a mystical key that determines their divine standing. Assisted by his telepathic, deceased partner known as the Dead Man, Garrett navigates a chaotic landscape of religious riots, shapeshifting goddesses, and a lethal hunter named Nog. The plot blends hardboiled detective tropes with high fantasy, focusing on the protagonist's cynical indifference toward the gods’ petty squabbles. Ultimately, Garrett must prevent these competing immortals from inadvertently tearing a hole in reality and unleashing ancient horrors upon the world.