This was a good book. Full of lots of elements that I enjoy - a magical library, alternate worlds, a steampunk setting, dragons, fae and all sorts. The premise was interesting - collecting a special book for the library which turns out to have been stolen and leads them on a wild goose chase. 
 Sometimes I got a bit confused by all the different groups of people and why they were after the book. And I don't quite understand the ending either. 
 I liked it enough to consider checking out the second book in the series.