The product is a lot of five Star Trek TOS paperback books from Pocket Books, featuring titles #37, 38, 39, 42, and 40. These books fall under the science fiction and horror genre within the Star Trek franchise. Fans of the series can enjoy reading these collectible paperback books that delve into the adventures and explorations of the Star Trek crew. Perfect for both longtime fans and new readers alike, these books offer a thrilling and immersive experience within the Star Trek universe. Book 1