At Wimbledon in 1981, John McEnroe was already an established star, famous for his anger at umpires. In the first round, one ump said to McEnroe: "I'm Scottish, so we are not going to have any problems, are we?" In his new autobiography, "You Cannot Be Serious," McEnroe writes, "I guess since my name started with "Mc", he thought we were soul brothers! I'm Irish", I told him curtly. McEnroe's autobiography (written with James Kaplan) is a detailed look largely at his epic battles on the court with the likes of Jimmy Connors and Bjorn Borg. McEnroe, whose grandparents came from Cavan and Westmeath, also touches on his Queens youth, and, of course, his tumultuous relationship with actress Tatum O' Neal. Mac's apparently still got it: the book shot to # 1 on the New York Times best-seller list the week it came out. ($25.95 / 342 pages / G.P. Putnam)