Matthew Restall, author of Elton John’s Blue Moves, on why he didn’t write a 33 1/3 on Goodbye Yellow Brick Road. Early in my Blue Moves book I ask the question that Elton fans almost always ask me when they discover that there is a 33 1/3 book on a John album: why did I write about Blue Moves and not Goodbye Yellow Brick Road? Yellow has sold ten times as many copies as Blue. It is the only John album consistently ranked in listings such as Rolling Stone’s Greatest…