Starship: Mutiny — Mike Resnick

The starship Theodore Roosevelt is fighting on the far outskirts of a galactic war, its crew made up of retreads and raw recruits. A new first officer reports, Wilson Cole, a man with a reputation for exceeding his orders (but getting results). He's been banished to the Teddy R. for his actions, but once there he again ignores his orders. ... This is the first of five novels about the starship Theodore Roosevelt. The next four will be, in order, Pirate, Mercenary, Rebel, and Flagship.