In a nut shell this book is about three different parts of Conqueror's history:
1) The Falklands - Which is very interesting and detailed, but doesn't reveal anything new.
2) The Political fallout of the Government's lies and their shameful attempt to cover them up by smearing some of the crew/civil service.
3) A top secret cold war operation that took place just after the Falklands war.
All three sections are interesting, the middle section probably being the most intriguing regardless of the fact it has little to do with the sub itself.
Overall a very good book. I just wish there were more details on the cold war ops, but as the author pointed out, many of these are still covered by the official secrets act.