Sing Christmas - Book & CD. Is a collection of 15 popular songs selected from our musicals and songbooks, ideal for school singing, choirs and concerts. The songs may be sung in unison, but several have easy 2-part harmony and counterpoint options for more able singers, making the collection very versatile, and useful throughout the primary age range. The CD provides full vocal demonstrations by children for easy teaching, and instrumental backing with clear melody cues for performance.