The product is a novel titled "Time for Yesterday" by A. C. Crispin, part of the Star Trek book series. Published by Simon & Schuster in 1988, the book is a science fiction story in the space opera genre. With a total of 160 pages, the mass-market format makes it suitable for young adults and adults interested in science fiction and media tie-ins. The book is a reprint edition and is written in English.