Dark Star — Alan Dean Foster

ALL SYSTEMS -- SNAFU!

If anything could possibly go wrong aboard the scoutship Dark Star, sooner or later it would. Now, in the twentieth year of their mission--destroying unstable planets--the ship and its crew were slowly and steadily falling apart.

After 20 years in space, isolation and loneliness had left their mark. The four surviving crew members were bored beyond relief. Only an occasional bomb run or another of the inevitable malfunctions aboard ship upset the monotony.

Then, one day, Bomb #20 was primed, armed, and set to detonate...and suddenly life on the Dark Star became frantic...