Best Defense
The special 50th anniversary trilogy continues!

Best Defense is a Pocket TOS novel – the second novel in the Star Trek: Legacies trilogy – written by David Mack. Published by Pocket Books, it was first released in .

Summary 
From the book jacket
An all-new epic trilogy commemorating 50 years of Star Trek.A debt of honor: One brave woman ventures alone into a parallel universe to save her old shipmates, exiled there decades earlier by a mysterious device called the Transfer Key. She soon learns the alternate universe harbors not just an alien invasion force, but a secret that underpins its very existence.A mission of peace: A long-awaited Klingon-Federation peace conference convenes, led by Ambassador Sarek of Vulcan and Councillor Gorkon of Qo'noS. But both sides have enemies who would prefer the two great powers remain at war – and who will do anything to make certain hate wins the day.An errand of justice: Captain Kirk and his crew seek the stolen Transfer Key that opens a door between universes, but their hunt is cut short by Ambassador Sarek's plea for help. The  crew soon becomes targets in a deadly crossfire – one whose outcome will decide the fate of two universes. Background information 
 This story takes place about six weeks after the events of Captain to Captain'', and about a week after .
 Cover art and design by Alan Dingman.

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