I've had a few inquiries lately about when my next book is coming out. The follow-on to The Perfect Assassin is complete but not scheduled to be released until late 2013. I know this is a big lag (I find it frustrating as well) but after that I expect to have at least on title a year hitting the shelves.
The gap between completion and publication is a particular problem for those of us who write contemporary spy thrillers because in that interim world events can change. Think Arab Spring and the issue of Iran's nuclear program.
Best to all for a cool summer!