Famous & Fun Christmas Duets Book 57 Duets for One Piano, Four Hands by Carol Matz Famous & Fun Christmas Duets, Book 5 contains 7 carefully selected Christmas favorites. The duets are arranged in equal parts for intermediate pianists, and are written for one piano, four hands. The melody often shifts between primo and secondo, creating interesting parts for both players. The arrangements in Book 5 include 16th notes, dotted eighth notes, and key signatures with no more than two sharps