Wikipedia
K-PAX is an American science fiction novel by Gene Brewer, the first in his in the K-PAX series.
The series deals with the experiences on Earth of a man named Prot (rhymes with "wrote"). It is written in the first person from the point of view of Prot's psychiatrist.
K-PAX was adapted into a theatrical film by the same name, released in 2001.
K-PAX is a 2001 American science fiction- mystery film based on Gene Brewer's 1995 novel of the same name, directed by Iain Softley, starring Kevin Spacey, Jeff Bridges, Mary McCormack and Alfre Woodard. The film is about a psychiatric patient who claims to be an alien from the planet K-PAX. During his treatment, the patient demonstrates an outlook on life that ultimately proves inspirational for his fellow patients and especially for his psychiatrist.