To those of you living in, or if you have lived in Denver try a John Dunning. His latest out in paperback is The Sign of the Book.
He used to own the The Old Algonquin Bookstore on Colfax. Most of his novels have lots of tidbits in them regarding what makes some books of more value than others. What's collectible. Psuedonyms. Interesting stuff for those who love books.
Plus it's local. All the places are familiar to Denverites.
Fun stuff and entertaining reads.