 First then, Amir K. Thompson, professionally known as Questlove. He's a Grammy award-winning musician, Oscar-winning filmmaker, DJ, drama, musical director on The Tonight Show with Jimmy Fallon, founder, member of The Roots, professor and author, and the list goes on. He's also hip-hop's unofficial historian, a man with an encyclopedic knowledge of the music genre. And Questlove's put that knowledge to good use with co-author Ben Greenman.