Read and done. Usually, I categorize a series of books together, and this really should be clumped with Leviathan. However, I enjoyed Behemoth a lot more than it's prequel so I'm giving it its own post.
Three main things I got from this book: fast paced plot, Deryn/Dylan is way less annoying, and ohmygoodnessMr.Westerfieldwillyoupleasestopwiththecliffhangers!
Ok, now go read.