Best Pop Book Ever?

Oh, small wonders still exist. The best book on Pop music ever written? One can argue, but one wouldn't deny that Greil Marcus' Mystery Train is in the discussion. Now in its 5th edition (Plume), the 2008 edition has seen its Notes and Discography section updated. Boy, I wish all music books followed Marcus' lead with that section. Written in 1975, this is the first update in 10 years. Marcus' original pieces will make you think that Harmonica Frank is as important to the canon as his definitive essay on Elvis Presley.