Anyone who grew up with the two Johns - this book is an excellent read. Just finished it.

[ame=http://www.amazon.co.uk/Masters-Doom-Created-Transformed-Culture/dp/0749924896/ref=sr_1_2?ie=UTF8&s=books&qid=1257006253&sr=1-2]Masters of Doom: How Two Guys Created an Empire and Transformed Pop Culture: Amazon.co.uk: David Kushner: Books[/ame]