I have 'The Art Of The Muppets' signed by Kermit as well! Looks almost exactly the same as yours. I found my copy at a used bookstore - and in the pages, there is a letter, on Muppet letterhead, saying: "It is our pleasure to send you the enclosed, in response to your auction request. We hope that it provides support for your very worthwhile undertaking, and we wish you well with your charitable endeavor. With kind regards, Ellen F. Wagner, Jim Henson Productions" I'm assuming this is signed by Jim Henson - considering the book is a first edition from 1980, and Steve Whitmire didn't start playing Kermit until 1992. But yes - I am curious as well - does anyone on here know if this is Jim's signature as Kermit?