(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."  QUESTIONS:

Q1:
1. What did Allen Klein do for a living?
2. How was Allen Klein employed?
3. What was Allen Klein's job?
Q2:
1. Did Allen Klein have famous clients?
2. Were there famous people among Allen Klein's clients?
3. Did Allen Klein collaborate with celebrities?
Q3:
1. Who were famous clients of Allen Klein's?
2. What were some celebrities that Allen Klein worked with?
3. Who were some of Allen Klein's celebrity clients?
Q4:
1. What was the name of Allen Klein's company?
2. What was Allen Klein's firm called?
3. What did Allen Klein call his company?
Q5:
1. Did Allen Klein's company undergo a name change?
2. Was the name of Allen Klein's company ever altered?
3. Was there ever a change to the name of Allen Klein's company?
Q6:
1. What was the name of Allen Klein's company changed to?
2. What did Allen Klein's company change its name to?
3. What was Allen Klein's company called after it changed names?
Q7:
1. Where was Allen Klein's company based out of?
2. Where was ABKCO Music & Records based?
3. Where were the headquarters of ABKCO Music & Records?
Q8:
1. Who did Allen Klein help gain control over his work?
2. Who did Allen Klein represent in an attempt to control his own work?
3. Who was represented by Allen Klein during negotiations to control his work?
Q9:
1. Was Allen Klein a lifelong friend of the Beatles and the Rolling Stones?
2. Did Allen Klein's relationships with the Rolling STones and the Beatles end well?
3. Did Allen Klein maintain an amicable working relationship with both the Beatles and the Rolling Stones?
Q10:
1. What happened to Allen Klein's relationship to the Beatles and the Rolling Stones?
2. How did the relationship between Allen Klein and both the Beatles and the Rolling Stones end?
3. How did Allen Klein's relationship with both the Rolling Stones and the Beatles end?
Q11:
1. How many songs did ABKCO Music & Records have the rights to?
2. The rights of how many songs belonged to Allen Klein's company?
3. What was the number of musical numbers whose rights belonged to ABKCO Music & Records?
Q12:
1. Did Paul McCartney want to work with Allen Klein?
2. Was Paul McCartney in favor of partnering with Allen Klein?
3. Did Paul McCartney push for a partnership with Allen Klein?
Q13:
1. Did any members of the Beatles try and persuade Paul McCartney to partner with Allen Klein?
2. Was anyone in the Beatles in favor of a partnership with Allen Klein, unlike Paul McCartney?
3. Did a Beatles member convince the other group members to work witth Allen Klein?
Q14:
1. Who was the Beatle that persuaded everyone to work with Allen Klein?
2. Which member of the Beatles was most strongly in favor of partnering with Allen Klein?
3. Which of the Beatles convinced the others to partner with Allen Klein?
Q15:
1. What percentage of musicians does Allen Klein see as losers?
2. How much of the music industry does Allen Klein feel are losers?
3. What's the percentage of musicians that Allen Klein thinks are complete idiots?
Q16:
1. Was Allen Klein generally tactful?
2. Was Allen Klein full of tact?
3. Did Allen Klein usually act gracefully?
Q17:
1. Who retained Allen Klein for representation, besides the Beatles and the Rolling Stones?
2. Who did Allen Klein represent, in addition to the Beatles and the Rolling Stones?
3. What musicians, besides the Rolling Stones and the Beatles, were represented by Allen Klein?
Q18:
1. Did Allen Klein hold copyright to any songs by the Kinks?
2. Were the copyrights to any of the Kinks music possessed by Allen Klein?
3. Was Allen Klein the owner of the copyright of any works by the Kinks?
Q19:
1. Did Allen Klein hold copyright to any songs by Chubby Checker?
2. Were the copyrights to any of Chubby Checker's music possessed by Allen Klein?
3. Was Allen Klein the owner of the copyright of any works by Chubby Checker?
Q20:
1. Who was Allen Klein arguing against when he represented Sam Cooke?
2. Who did Allen Klein argue against on behalf of Sam Cooke?
3. WHo was Allen Klein defending Sam Cooke against?
Q21:
1. What was Allen Klein's cause of death?
2. How did Allen Klein die?
3. What illness brought about Allen Klein's death?
