I'm not sure if it's official/final but Anthony Huso posted this pic on Twitter on September 21. It didn't make much noise but it's the cover for his second novel, the book following the amazing (at least to my taste, my review here) The Last Page, a nice mix of steampunk and fantasy. The novel is titled Black Bottle and should be out in Spring 2012. That cover is really different in style over the previous book. There's still no synopsis I could find... the only hint being in this interview by Mad Hatter :
MH: Zeppelins are most definitely a helluva a lot of fun. After the amazing events of The Last Page what can we expect out of Black Bottle? Will we get to see more of the south? And is there a confirmed release date?
HUSO: In fact, a huge chunk of Black Bottle does, in fact, take place in the south. As for what you can expect, it's really just the other half of the story. You could lump both books together in a significantly fatter volume and have one novel. At least, that's the idea.