For Sale Improvisational Patterns The Bebop Era Vols 2 & 3. by David Baker. Treble clef. These are fairly old copies. The covers and the edges of the pages are a little yellowed/dirty, just from sitting on my bookshelf. The insides are fine. The volumes are independent. You don't need volume 1 to use 2 & 3. $12 for both, inc. shipping CONUS.