 Boosey & Hawkes signed Norton in 1983, and the first of the Microjazz series appeared, an educational music series that has expanded over 30 years to include music for all of the major instruments with piano, ensemble books, backing tracks and midi-file backings.it ranked as the biggest selling music series for Boosey & Hawkes, with well over a million sales to that date.Boosey & Hawkes claims that it is "one of the most widely used educational series ever published."