He wrote several reference works on music genres including Disco and Hip-hop, before moving into practice focusing on media law.
Shapiro has written for Spin, URB, Music Week, Uncut, Vibe, The Wire and The Times.
His 2005 book, The Rough Guide to Hip-Hop, has been cited as an "important" reference source on the subject, with entries that are "comprehensive and commendable".
[7] In 2005 Shapiro authored the book Turn the Beat Around: The Secret History of Disco which charted the history of the Disco genre including from the Swingjugend of Nazi Germany and the Zazous of France, to how the repetitive beats "opened the doors to techno, house and hip-hop".
It received positive critical reception, which included a review in The Observer that highlighted how the book rehabilitates the "dinosaur" that is Disco, and Gary Lachman of The Guardian stated he "put down the book knowing a great deal more about disco than I ever wanted to".