4.5 stars. If you are both a sci-fi/fantasy nerd and a library nerd, this book will charm your socks off. By page 5, you'll be thinking, "Oh, that's a really cool idea." By page 6, you will be laughing aloud. By page 7, you will desperately want to be a libriomancer. And the rest of the book doesn't disappoint.Admittedly, a large part of the appeal of this book is the concept. BOOK MAGIC. I mean, how could you not be in love with that idea? The idea alone gets at least two stars. The plot is solid enough to add two more. I'm not 100% in love with the characters--I don't wish they were real so we could be besties, or whatever (except maybe Smudge, the adorable flaming arachnid)--but they're well done enough to support the kickass concept and plot. And I thought Lena the dryad sidekick/love interest's character could have gone very, very poorly (you'll know what I mean when you read the book), but Jim Hines managed not to make her into a trainwreck. And I appreciate the way the romantic subplot was resolved. There's also some great humor, and a lot of fun literary shoutouts (how could there not be in a book about BOOK MAGIC?).This original urban fantasy novel will be one I recommend for years, simply because of the awesome concept. However, despite my high regard, I don't know that it will make its way onto my own favorites shelf--the characters aren't quite amazing enough for that. Still, this is an absolute must-read for the library/SFF nerd crowd. Let's all be libriomancers.