Celestial Navigation was a textbook publication dealing with the topic of space navigation, authored by Wendy Lesnick. By the 23rd century, where most reading was done via computer and computer tapes, this volume was a rare printed anachronism that was part of the collection of James T. Kirk. Cadet Kirk had this book, along with several others, in the bosun's locker aboard his first shuttle command, the Zodiac-class warp shuttle Spitfire. When Ensign Leonard McCoy was a passenger on Spitfire, he commented on Kirk's propensity for hardcopy paper volumes. (TOS - Starfleet Academy novel: Cadet Kirk)