Elizabeth J. Rosenthal, His Song: The Musical Journey of Elton John (2004)
Rosenthal leaves no musical stone unturned in this biography of Elton John, which focuses primarily on cataloguing his musical development, achievements, and, well, pretty much everything else to do with his musical career.
Philip Norman, Elton John: The Biography (2001)
Norman is smart and engaging in this biography of the piano man, which strikes a nice balance between cataloguing John's life and providing what is, at times, engrossing cultural analysis.