One of my favorite things to do is to go to used books stores to look for books. Here are some sci-fi books that I found down here in Orlando. Battle for Planet of the Apes was an especially surprising find. It turns out that David Gerrold who wrote it also wrote for Star Trek, including probably the most famous episode, “The Trouble with Tribbles.” THX 1138 was another good find that I never knew was a book. I really like these vintage covers and sometimes have to hold back from buying a book just based on its cover.