Subtitled ""Musical anecdotes"", these biographies, attractively designed and illustrated charmingly by Andre Dugo with decorative black and whites and full pages and double spreads in full color, are excellent introductions to two of our favorite composers. The emphasis, quite naturally, is on the precocity of these two men who came to fame almost as children. Lively and colorful episodes have been selected. Mayo tells his story of Mozart more or less ancedotally, while Ruttkay links his episodes to Chopin's musical compositions, and is -- for his audience -- perhaps more successful. Both books should make ideal gifts for young musicians. Fabric bindings -- better type face than most of the Hyperion productions -- delicate coloring makes perishable but attractive jackets -- lovely end papers.