Unfortunately, my favorite book by Dave Horowitz, A Monkey Among Us, is out of print. However, he has written a number of other books which are in print. You can read all about them on Dave's website here.
If you're looking for a little entertainment for you and your children, I recommend you visit the "movies" link on his website. You can hear Dave reading his books with quirky music (and the occasional salty comment) in the background.
Fun, fun, fun!