Yeah, I have a few like that too. I never gave it a thought.
I was sitting in Jack Thirtle's office when the new Mees and James came out. His secretary came in to give it to him and he took the old one off the shelf in his book case. Then he turned to me and said something like "Ron, you want this old thing?" and so I have Jack Thirtle's copy with his "autograph" on the inside. I have Haist with a personal autograph "For old times sake, Grant". More like that. Maybe someday, someone will have some of my books. Of course they will be written by someone else except for my own book.