Deadlock by Sean Black
His mission should have been straightforward: to keep one man alive for one week. One prisoner - Super-intelligent and brutally violent, Frank 'Reaper' Hays is a leading member of America's most powerful white supremacists prison gang. One bodyguard - Ex-military bodyguard Ryan Lock has been hired to protect him. His mission is to keep Reaper alive for a week until he can be brought to trial. One week to stay alive - But Lock soon realises that he faces the toughest assignment of his career - just to survive ...