“The piano ain’t got no wrong notes!” So ranted Thelonious Sphere Monk, who proved his point every time he sat down at the keyboard. His angular melodies and dissonant harmonies shook the jazz world to its foundations, ushering in the birth of “bebop” and establishing Monk as one of America’s greatest composers. Yet throughout much of his life, his musical contribution took a backseat to tales of his reputed behavior. Writers tended to obsess over Monk’s hats or his proclivity to dance on stage. To his fans, he was the ultimate hipster; to his detractors, he was temperamental, eccentric, taciturn, or childlike. But these labels tell us little about the man or his music.