Who wrote CATCH 22?

Joseph Heller

Correct!
The title of this dark satire written in 1961 relates to the skewed military logic that
entraps the protagonist, Yossarian, a pilot serving in Italy during World War II. He tries to get himself grounded by being pronounced insane, but is told that only an insane person would want to fly, and his desire not to fly proves that he is, in fact, sane, and so must continue to fly.