As I said in the back of Vengeance, I'm working on the second book right now. Aiming for an early June release (obviously in 2014, but I've had some people assume the worst..)
The reason it'll take so long, relatively speaking, is because I've got to take time to set up my online presence. Case in point: this website. It takes time away from writing. But once everything's done on that front, I can dive right back into writing. In the future, I think I'll be able to release books every 6 weeks or so.
Volume 2 is about 20% complete.. and I'm liking it. A lot. At least, I enjoy writing it. My operating mantra is that if something's boring to write, it'll be boring to read -- and vice-versa. So if I'm having fun putting the words on paper, chances are good you guys will enjoy what I'm coming up with, too.
(I hope)
If you don't want to miss the release, sign up for the mailing list. I'm not one of those authors who'll send tons of random shit about me. The only email you'll get is when the book comes out, because, frankly, what else do you want to know?
Cheers,
Edward M.