These are great solo collections with accompaniment CDs for instrumentalists wanting to play in a jazz style without the need to improvise. What would be the "improvised section" has written solos provided in the appropriate jazz style for the tune. If improvisation is a problem, then players can learn and enjoy these jazz standards without the need to improvise! All of the books are compatible, with only minimal changes in the "variation" section to accommodate the ranges and unique characteristics of the instruments. Titles include: Ain't Misbehavin'; As Time Goes By; But Not for Me; Embraceable You; I Got Rhythm; My Funny Valentine; Over the Rainbow; Strike Up the Band; Summertime; Sweet Georgia Brown and 'S Wonderful.