Black gives up the struggle for the centre for a moment. If Black wins he succesfully managed to hold in the middlegame, more often White demonstrates that the Bishops supports the open centre. 44 well-analysed games should convince you that thanks to the ideas of young Russian players like Morozevich and Volkov, Black gets a good game. A nice openingbook, but I'm not completely convinced, maybe as most players are, which makes it very usefull in the hands of a prepared Black-player. Of course there is a reason for that.
Most players lack an endgame leanringbook in their chessbook library.
Of course there is a reason as well, they see little potential in studying this phase of the game. If they reach it, they can look it up. Look in most endgame books, it looks little fun to study it. McDonald writes very educational and entertaining. It's targetted at chessplayers with some knowledge but not to much.