(CNN) -- Music manager Allen Klein, whose clients included the Rolling Stones and the Beatles, died Saturday after a lengthy battle with Alzheimer's disease, his publicist said. Klein was 77.

The son of Jewish immigrants from Hungary, Klein founded his firm Allen Klein & Co. in the late 1950s before the label evolved into ABKCO Music & Records in New York. The independent label holds the copyrights to music by the Rolling Stones, Sam Cooke, the Animals, the Kinks, Chubby Checker, Bobby Womack and hundreds of others.

Klein represented dozens of artists, including Sam Cooke, the Animals, Bobby Darin and Herman's Hermits. He changed the music industry when he represented Sam Cooke in negotiations with RCA, winning the artist control of his own master recordings.

Known for a tenacious and often blunt style in negotiations, Klein's greatest coups were inking contracts with the Rolling Stones and the Beatles, though both relationships ended in legal battles.

ABKCO built up a catalog of copyrights to more than 2,000 songs, including much of the Stones' 1960s catalog. Klein retained ownership of those titles even after splitting with the Stones. In 1969, John Lennon persuaded the other Beatles that Klein should take over the group's business affairs, but Paul McCartney resisted the move and some music historians say the appointment hastened the Beatles' split.

Lennon later fell out with Klein, who was thought to be the target of the former Beatle's 1974 song "Steel and Glass."

Defending his tough style, Klein told Playboy magazine in 1971: "The music business is about 99 percent no-talent losers who can't stand a winner in their midst."

1. What was Allen Klein's occupation?
2. Did he have famous clients?
3. Who?
4. what was the name of his company?
5. did it change names?
6. What did it become?
7. Where was it based?
8. Who did he help win control of their work?
9. Did his work relationship with the Rolling Stones and the Beatles stay friendly?
10. what happened to them?
11. How many tunes did the company hold the rights to?
12. Did Paul McCartney want to partner with him?
13. Did any of the other Beatles?
14. Who convinced them to join with him?
15. What percentage of the music field did he consider to be losers?
16. Was he usually tactful?
17. what other musicians did he represent?
18. Did he hold any copyrights to any works by The Kinks?
19. What about Chubby Checker?
20. who did he argue against for Sam Cooke?
21. what did he die of?
1. music manager
2. yes
3. The Rolling Stones and The Beatles
4. Allen Klein & CO
5. yes
6. ABKCO Music & Records
7. New York
8. Sam Cooke
9. no
10. they ended in legal battles.
11. over 2000
12. no
13. yes
14. John Lennon
15. about 99 percent
16. no
17. Sam Cooke, the Animals, Bobby Darin and Herman's Hermits.
18. yes
19. yes
20. RCA
21. Alzheimer's