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Millenia ago, an apocalyptic battle was fought in the Alpha Quadrant. The losers were banished, but what became of the victors?

The Federation is threatened by this ancient mystery when a battered and broken version of the Defiant is found, frozen for five thousand years, in an icy cloud of cometary debris. Captain Sisko and the crew of Deep Space NineTM are summoned to answer the most baffling question of their lives: how and when will their ship be catapulted back through time to its destruction? And does its ancient death mean that one of the combatants in a primordial battle is poised now to storm the Alpha Quadrant? Only the wormhole holds the answer -- and the future of the Federation itself may depend on the secrets it conceals.

Almost a century ago, Captain James T. Kirk and the crew of the "Starship Enterprise" first encountered the irresistible (and astonishingly prolific) life-form known as the tribbles, resulting in one of the most unusual adventures in the annals of Starfleet. Now Captain Benjamin Sisko and the crew of the "Defiant" are transported back in time to that historic ocassion, where Darvin, a devious Klingon spy, plots revenge against Captain Kirk. Using the seemingly harmless tribbles, Darvin attempts to destroy Kirk - but for the misplaced residents of "Deep Space Nine", saving the original "Enterprise" will be nothing but "tribble."

This book also features an introduction written by David Gerrold, the author of the "Trouble with the Tribbles" TOS script.

A blast to the past! Jake Sisko is wondering where life will take him next... and the answer is the past! Chief O'Brien has promised to deliver a gift to a physicist, Professor Jonathan Vance. And Jake and Nog are allowed to accompany him to France. Vance shows them his "time machine", the first one ever to control time jumps with accuracy. When his assistant, Kruger, attacks him and steals the control device, Jake, Nog and O'Brien leap through the portal after him. They find themselves in Normandy, France, in 1944 during the middle of World War II. With Kruger joining the ranks of the Third Reich as a colonel, history is about to be changed forever. Can they stop Kruger from informing Hitler that a secret invasion will happen in Normandy?