As far as I can tell this is the exact same book as his book entitled Whacky Toys, Whirligigs & Whatchamacallits.
It has a new cover, a new title, a new blurb from the publisher on the back cover...but that's about it.
My opinion stands that this is one of the top three automata books for aspiring makers to have. It remains one of the few books with actual plans for making wood automata. His style is wonderful.
The fact is though, if you own one of these titles you don't really need the other.
On a brighter note, this must mean that his other new book, Creative Kinetics: Making Mechanical Marvels in WoodMUST be new material!