"American Gods" is a novel by Neil Gaiman that explores the conflict between old gods and new deities in modern America. The story follows Shadow Moon, an ex-convict who becomes embroiled in a battle between these supernatural beings as he travels across the country with the enigmatic Mr. Wednesday. The book delves into themes of belief, identity, and the changing nature of society. It features a diverse cast of characters, including mythological figures from various cultures, highlighting how traditional beliefs clash with contemporary values in a rapidly evolving world.