Muhammad Ali--""this century's greatest shining star?"" Symbol of ""truth and decency"" and the Black Muslim way? High-flown perhaps, but there's no denying the blithe appeal of the Champ in this unashamedly admiring biography. From the loudmouthed Louisville boy who boxed to ""make a lot of money, have a little fun, and above all, stay pretty,"" Cassius Clay became the darling--and the goat--of the world's boxing fans as the center-stage ham who infused new blood into a then-venal sport. Anecdotes puncutate the story, usually at the expense of other boxers (Foreman is called ""an Uncle Tom""), the boxing establishment, and, in one example of offhand racism, the Indians. But even quotes from Howard Cosell can't sink this Champ-happy chronicle. A G-rated version of lose Torres' adult bio . . . Sting Like A Bee (1971) and a good lead-in to Ali's autobiography.