A Perfect Mess: The Hidden Benefits of Disorder -How Crammed Closets, Cluttered Offices, and On-the-fly Planning Make the World a Better Place, by Eric Abrahamson and David Freedman, (read by Scott Brick)Work Like DaVinci: Gaining the Creative Advantage in Your Business and Career, by Michael J.Gelb and read by the author.
Michael Gelb uses DaVinci's notebooks to identify seven principles that he claims contributed to DaVinci's genius. For better or worse, he names the principles in Italian. If you speak Italian, that is probably okay, but it is a little gimmicky. On the other hand, the ideas in the book are actually useful and that puts the book ahead of the field for most of the self-help-personal-growth genre.