I remember reading in a biography of F. Scott Fitzgerald that he would, in the latter years of his short life, occassionally stroll into this or that bookstore, announce himself as "F. Scott Fitzgerald, the famous author", and request a copy of one of his now out-of-print novels. 😅 Inspired by his self-deprecating humor, I occasionally enjoyed a similar quest. I would enter a bookstore, search for a copy of my own out-of-print young adult novel, and then surreptitiously sign the title page, along with a brief, scribbled note. This always felt as if I were defacing the thing, or somehow defiling an otherwise clean copy, and so I would have whatever companion I was with stand in front of me in order to block the view. I could just imagine being detected by a diligent, though humorless clerk, who would wag a finger and say, "You mark it, you buy it!"