I have used his book which is the best I have ever read so far while preparing for Vivas. I initially rejected by collegues to use this book as I thought it would be little knowledge but infact after reading it I want to read it again and again. It is organzed in Question NAswer format and even one of my consultants who had a look at it ( he is a RCS Edinburgh Examiner) said that this book has atleast all those questions with answer that e normally asks his andidates.
You can always broaden your knowledge by reading from other books but presents it in the most simple format.
Highly Recommended if you want to have organized thoughts in Vivas.