I feel like I've been talking a lot about female main characters who dress as boys to make their way in the world. So you should know by now, any story that uses this plot element goes immediately on my wishlist (and settles somewhere near the top. Don't know why, it just never gets old.) Add in steampunk, zombies and the old west, and we've got ourselves a HELLS YEAH.
Dead Reckoning by Mercedes Lackey & Rosemary Edghill
Expected publication: June 5th 2012 by Bloomsbury USA