He knows when you are sleeping and he's sneaking in the shadows of your Christmas tree! This piece features classic holiday tunes that transform into a top-secret mission with some fun percussion effects. Included are simple 3-part harmony with easy rhythms no low-2 finger patterns and subtle hints and quotes from 'Jolly Old St. Nicholas ' 'God Rest Ye Merry Gentlemen ' 'Up on the Housetop ' 'J…