Title: Paranoia - Joseph Finder - book
Summary :
Adam Cassidy is 26 years old. A junior employee at a high-tech company, he hates his job. The day he very recklessly plays with the computer system to help a friend, he finds himself accused of theft. His bosses give him no choice: prison or becoming their spy at their main competitor, Trion Systems.
He's trained, coached. He's given secret information. Arriving at Trion, he's greeted like a star with a spectacular future, and therefore eyed with suspicion by jealous colleagues. Adam discovers talents he'd always thought he was incapable of.
His new boss praises him to the skies and calls him "up to the top floor" to work alongside him.
This is when the nightmare begins...