Don't worry John, I am not advocating 4.Bxc6
It is different from the Khalifman books in a number of ways.
To begin with, I am recommending a completely different set of lines. After 3...a6 4.Ba4 Nf6 I recommend the Worrall with 5.Qe2 in order to avoid giving Black the choice between the Open variation, Marshall, and all the other challenging responses to the main line. This is a useful practical weapon which has received very little attention in previous books, and I hope it will provide a refreshing change from the familiar main lines. Another useful point is that against the Berlin there is the convenient reply 4.Qe2, leading to almost identical positions without having to spend hours studying the subtleties of the Berlin Endgame.
Secondly, there is much more explanation of ideas, which I hope will make it a useful guide for less experienced players. At the same time, the analysis is extremely thorough (more detailed than Khalifman in a number of areas) so I hope it will also prove suitable for very strong players.
In particular, a lot of Black's third move deviations such as 3...d6, 3...Nd4 and others, have been severely underrated by many sources, in my opinion. Even the outstanding Khalifman books are sometimes a little too quick to dismiss a position as 'plus equals' when in reality it is rather unclear. The high page-count is a result of the combination of detailed analysis and explanation of ideas.
Incidentally the length of the book was not planned, either by myself or Everyman. I could have written half as much as I did, but I wasn't counting pages - I just set out to write the best book I could, and was rather shocked when I found out how large it was!
I'm not 100% sure of the RRP, although I think it will be around the same as the rest of the 'Play The ...' series.