Yes, now it can be told: My agent has been working hard, and now a third (!) series, about a talent agent for animals who gets embroiled in investigating crimes, will be coming from Thomas Dunne Books in 2016 (I think)!
I can't tell you much right at the moment--mostly because I don't know that much--but there will be at least two books in the new series, and I'm in the middle of the first one right now. I think it's going to be a lot of fun, and I promise I'll let you know more as soon as I can.