It's kind of weird randomly discovering today that my PhD thesis is listed on Amazon. You can't buy it (they "don't know when it will be in stock"), but it's got a page there. The damn thing's 25 years old now, almost completely uninteresting to me, but it's still out there. (As far as I can tell it's pretty uninteresting to the theoretical computer science community too, as it appears to have been cited exactly once in all that time.)