Great book! Cool little tidbit of trivia I did not know...the 1st 6 seconds of Hot For Teacher is actually a recording of Ed's Lamborghini exhaust pipe.
Another cool couple good reads on the topic are "Runnin with the Devil" by their Manager Noel Monk. And "Van Halen Rising by Greg Renoff."
In their very early days under the band name Genesis, they were influenced by the band Cactus. They would cover the first song of their first album Parchman Farm (1970), you can hear its influence on Ed's playing.
Since VH is a hot topic on the boards recently, here are a few cool youtube links. God Eddie was a Prodigy!
https://m.youtube.com/user/MugenMazeru/videos
That video/audio from 1975 is incredible! Ed's rhythm is second to none.