That's the problem with this book.It says it is an inside account,but,in the nature of underground paramilitary groups,the reader is left to take so much on trust.Virtually all the sources are "Republican source","confidential interview" and the like-it's hard to know what to believe.
For all that,the material from 1976 onwards(Gerry Adams becoming political leader,the dual nature of Sinn Fein and the IRA,the politicisation of the IRA,the drive towards negotiations,and finally Sinn Fein's eclipsing others to become the dominant Catholic/nationalist party in Northern Ireland)is highly plausible and well written.His conclusion,that the extremes have now taken over Northern Ireland,and that sectarianism is more established now than it ever was during The Troubles,is hard to argue with.A depressing conclusion to a depressing history.