MB99921BCD - My Very Best Christmas, Viola Edition Book and CD Set. 17 Viola Solos, Duets, and a play-along CD on Christmas favorites arranged and edited by Karen Khanagov. The seventeen Christmas songs in this volume, arranged in comfortable keys, can be used for players at different levels and for all kinds of occasions. All three editions (Violin, Viola, and Cello) include two parts for either solo or duet performance and piano accompaniment.