by Timothy Zahn
Baen Hardcover ISBN/ITEM#: 1416509259
Date: 03 January, 2006 List Price $25.00 Amazon US / Amazon UK /
From book flap: Allen Caine was too young to remember when the Earth had not been a conquered planet, one of many such in the huge and sprawling Ryqril empire, but he knew of the legendary blackcollars, guerrilla warriors trained to the limit of human speed and skill, then turned into nearly superhuman combatants by use of the now-lost backlash drug.
Earth and its former colony worlds had been overwhelmed, but sparks of rebellion still smoldered, and the rebel underground on Earth had sent Caine on an undercover mission to the former Earth colony of Plinry, where there was a faint hope that a black collar unit still existed.
The underground alone knew of a secret that might be humanity's ace in the hole. And if a remnant of backcollar fighter still existed on Plinry, they were the only hope of playing that ace in a final bid for the freedom of humanity.