Exploding the Phone takes an ousider's perspective, having been written by a relative outsider, and the information having been gathered from interviews with those involved. However, I would say it's better than Ghost in the Wires, being a better told story overall. It's also pretty much the definitive history of the phone phreaking scene, AFAICT. Phil Lapsley put a lot of work into getting his interviews, and reading up on the tech. Read it, if only so that you'll stop believing people when they tell you how awesome John Draper is.