Dark Mirror is a science fiction novel by American writer Diane Duane, part of the Star Trek saga.

[1][2][3] In Dark Mirror, the Mirror-Spock left the Enterprise and rose through the ranks and spearheaded an effort to reform the Empire.

Personal communicators are intentionally not used in the mirror Starfleet; due to the prevalence of assassinations, they make crewmembers too easy to track down and kill.

He also finds that the seeds of the Mirror Universe's brutality lie in Khan Noonien Singh winning the Eugenics Wars.

Craig Hinton of TV Zone said the previous work of Diane Duane had been "exceptional" but that the book does not live up to expectations.