Start With a Coffin — Dean Wesley Smith

Brian Saber awakes with a start in his nursing home room.
On missions, Captain Brian Saber defends the Earth Protection League in his warship The Bad Business. Tonight, he will be asked to do a very special mission without fighting.
But he loves any chance to be young again and help the league in deep space on the very edges of League space.
Swashbuckling space battles in deep space, fought as only those in the last days of their lives can fight. No alien finds safety around Captain Brian Saber.