The blurb on the cover calls it "The definitive story of the BBC series" and that it is.
Containing email correspondence between head writer Russell T. Davies and journalist Benjamin Cook, the first half of the book concentrates on the production of the 4th series of Doctor Who's rebirth. The second half concentrates on David Tennant's last year as the Doctor leading up to his final episodes. Along the way you get a glimpse of storylines that didn't make it to production (including Penny, the companion who never was), find out the day-to-day dramas of bringing Doctor Who to the screen, learn about the politics of the BBC and experience David Tennant's final days on set. You also get Russell's muses on life, the state of television in the UK and everything.