Over the weekend, I finished re-reading American Gods by Neil Gaiman.

The premise of American Gods is that all gods are real, but are created, and sustained, by belief and worship. When immigrants came to North America, they brought copies of their gods with them but they have not thrived in their new environment. This serves as the backdrop for the main character's interactions with Odin and his schemes.

It's Gaiman's best book so far, and very well written, with enough character development and insight into the human condition to elevate it above a lot of modern fantasy.