Laver's is quality, The Education of a Tennis Player should be required reading for any tennis player or fan.
I also enjoyed Pancho Gonzales' book, The Man With A Racket. Sampras' book A Champion's Mind is a bit dull, but there are a bunch of diamonds in the rough in that book, invaluable tips hidden in there.
Rafa's book is very good, though I wish he had waited until after his career to get it out there.
Tilden's books were all good, Match Play and the Spin of the Ball and The Art of Lawn Tennis, as well as The Triumphs and the Tragedy.
Ilie Nastase's book, Mr. Nastase is hilarious