The Cyborg from Earth (Jupiter, book 4) by Charles Sheffield
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The Cyborg from Earth
(The fourth book in the Jupiter series)

A novel by
Charles Sheffield

Heir to a powerful military dynasty, Jeff Kopal has never lived up to his family's expectations. When he blows his naval entrance exams, he assumes his future is over. But if he's such a screwup, why is he being sent by the navy into deep space to deal with rebellious cyborgs? Something isn't right, and Jeff must figure out the real reasons behind the mission--or risk becoming a pawn in someone else's deadly game.