If you're planning on traveling soon or just want to explore a new state through a book, I've just updated my Reading the States posts (at the tab above.) There is one post for every state and a bonus one for cross country road trips.
Each posts includes fiction and nonfiction books set in the state. It also includes authors who live there or frequently write about the state. There are also links to bookstores and literary places to visit in each state.
Feel free to let me know if there's a book, bookstore or literary tourist spot I should add to a post!