Description: You've achieved the impossible. You've broken all the boundaries. What happens when they start fighting back? Tom Raines and his friends at the Pentagonal Spire are in Upper Company now, vying for spots in CamCo. But they soon discover troubling changes: the Spire is under new military control and cadets have suspicious neural processors, the first step in a plan with horrifying worldwide ramifications, and Tom is desperate to stop it. When the enemy comes for Tom, how much can he endure in the battle to save himself? And as the odds of success slip from his grip, is it even worth the fight? In this exhilarating, explosive, and heartrending conclusion to the Insignia trilogy, Catalyst brings Tom and his intelligent, passionate, and brave young friends stunning tests and dangerous confrontations, and through to an impossible future they could never have predicted.

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