Maxfield Doyle Crook (November 2, 1936 – July 1, 2020) was an American musician. His music was electronic music in pop. He was the featured soloist on Del Shannon's 1961 hit "Runaway", which he co-wrote. He invented the Musitron. He also recorded as Maximilian. Crook was born in Lincoln, Nebraska and raised in Ann Arbor, Michigan.