Philip Cato has written a book about Mott covering the 1969-74 period. Philip wrote an article about Mott for UK magazine Record Collector a few years ago. Although he is clearly a fan, the article contained several mistakes, so I was looking forward to seeing these rectified.
The book runs to 120 pages (A4 size), and contains many photographs (all in black and white). It contains a UK discography, and a complete gig guide. There are some 23 chapters, each of which covers a distinct period in the band's history. Although not individually titled, coverage is (roughly) as follows:
On the whole, the book is reasonably well presented and written, and it is nice to have, BUT there is little new here. There are still a few mistakes and the UK-only discography is both incomplete (it missed Greatest Hits) and inaccurate (the Backsliding Fearlessly CD, although widely available in the UK, was a US issue). Quotes are taken from contemporaneous magazine interviews and from interviews published in the Mott The Hoople, Outsider and Just a Buzz fanzines (although Sven and Justin are credited, permission to use their material was neither sought nor given). My advice is to save your money, and spend it instead on Campbell Devine's Offical Biography.