The Entropy Effect is a science fiction novel by American writer Vonda N. McIntyre, set in the fictional Star Trek Universe. Developed from a screenplay that McIntyre had conceived when she was 18, it was originally published in 1981 and is the first original story in Pocket Books' long-running series of Star Trek novels. The novel includes the first occurrence of given names for the characters Hikaru Sulu and Nyota Uhura, each of which were later made canon. Source: Wikipedia (en)