PHOENIX (AP) — Dale Wasserman, author of the book for the Tony-winning musical "Man of La Mancha" as well as the stage adaptation of Ken Kesey's novel "One Flew Over the Cuckoo's Nest," has died. He was 94.

Wasserman died December 21 of congestive heart failure at his home in Phoenix, his wife, Martha, said Saturday. "Man of La Mancha," the tale of the intrepid, ever idealistic Don Quixote, was one of Broadway's biggest hits in the 1960s. The show, which starred Richard Kiley and Joan Diener, opened in 1965 and won the Tony for best musical. It ran for more than 2,300 performances.

Its best known song, "The Impossible Dream," written by composer Mitch Leigh and lyricist Joe Darion, became a popular hit, particularly in a version by Jack Jones. The show has had several Broadway revivals since the '60s, with the latest in 2002 starring Brian Stokes Mitchell and Mary Elizabeth Mastrantonio.

Wasserman's adaptation of "Cuckoo's Nest," Kesey's novel about a renegade mental hospital inmate, opened on Broadway in 1963. The production, which starred Kirk Douglas and Joan Tetzel, only ran for a little over two months but later became a fixture in community theatres. It was revived on Broadway in 2001 with Gary Sinise and Amy Morton in the lead roles.

Although most people are familiar with the 1975 Oscar-winning film adaptation of "Cuckoo's Nest," which starred Jack Nicholson and Louise Fletcher, Kesey told The Associated Press shortly before his death in 2001 that he was more grateful for Wasserman's work on the play version, which has been published in 27 languages. "Without the play, the novel would have made a little bubble," Kesey said.

Born in Rhinelander, Wisconsin, as one of 14 children of Russian immigrants, he was orphaned at age 10 and sent to live with uncles and aunts.

He gave his wife instructions for his obituary months ago: "'The only thing I would want the newspaper to say is this: He invented the phrase 'The Impossible Dream' — and lived it,"' Martha Wasserman recalled.