I've been working for the last couple of months on this and it's almost ready: 'That 17th Hat'. I'm working on the last pages as we speak and then it's ready to go the printers. It will be released on December 1st, 2011.
Edit For those who are curious what this book is exactly: it's a picture book, written by Trevor Eissler and illustrated by me. This is a 3D model I photoshopped myself, the actual book isn't completely ready yet.
Thanks for all of your lovely comments!