Hello all, appreciate your views on this one. It's apparently an Alan Shepard signing of his Moon Shot book - only interesting because it looks very similar to one on Ebay with PSA. I asked the seller where he got it and he reckons in a book sale.
From what I've read, his signature got very sloppy in those book signings, and there's a great deal of variation to them. I, too, think it looks off, particularly the "S," but I'm definitely not sure given the variety in these signings. Hopefully Steve Zarelli will chime in with a more authoritative answer.
For what it's worth, attached is a photo of my signed copy, signed on June 23, 1994, I believe.
Thanks for the clarification, Steve. I thought this might be in the realm of possibility, but these book signing ones have always been problematic for me, given their variation.