The latest in the series, Mission:Explore Food, is being crowd funded at PleaseFund.us. There are a variety of levels to choose from, most of which will get you a copy of the book and your name in print. You can also get yourself included as an illustration (or surprise a friend). This is going to be a great book for kids and the young at heart. Check out the sample pages (PDF) and sign up as a backer today.