I picked up these books at a local used book store for almost nothing($3.00 each) and then noticed that the inside of the hard cover each had signatures on em, Alan Dean Foster in TMP, and Harve Bennett in TWOK. I've always wondered if they were authentic or not. It won't break my heart if they aren't, considering I've got all of six bucks tied up in em, but it would be nice to know... I'll try to get some pictures up in a few minutes. Here's TWOK..