I read this in mid June 2011 as a member of the Fantasy Book Club group read. A quick, easy read, as I expected from a young adult novel, and one of my first (if not the first) steampunk stories. I learned quite a bit about pre-World War I Europe through my tangential research to better understand the alternate view of those events presented by the author. I definitely related to the Clankers, one of the political powers of this world represented by the familiar Austrian-Hungarian Empire. The Darwinists, on the other hand, fascinated but left me queasy (similar to how I feel now about genetically modified flora and fauna). The inevitable intertwining of the two worlds from our two protagonists provided good action and drama, and some character development, but the ending just frustrated me. If you don't like very abrupt cliffhangers, you might want to have the sequels, Behemoth and Goliath, on hand when you finish Leviathan.