Is the movie "One flew over the cuckoo's nest" made by the book of the same name?

Or is it the other way around or something other.
If the book was written by the movie, then I would rather just watch the movie.
If the book was written first and then the movie was made by the book, then I'd rather read the book.

Steven S2015-01-14T01:22:29Z

Most movies will be adapted from books. It is rare to have it the other way around.
"One Flew Over the Cuckoo's Nest is a 1975 American drama film directed by Miloš Forman, based on the 1962 novel One Flew Over the Cuckoo's Nest by Ken Kesey, and starring Jack Nicholson, Louise Fletcher, and Will Sampson."

vambo number six2015-01-14T01:01:31Z

The book was written first, and is a lot better than the movie, as books almost always are.