Book excerpt: There are hundreds of opening books available, full of deep analysis, but many of them fail to explain the reasons for choosing one computer line over another. And how top players distinguish between good and bad opening lines remains a mystery to most of the chess world.Grandmaster Opening Preparation addresses such questions as how to balance computer preparation with human considerations, along with a wealth of practical advice on how to go about building the opening repertoire which is right for you. The book also provides an in-depth treatment of the evolution in understanding of Isolated Queen's Pawn positions, which will enable the reader to become more effective in a multitude of openings, with either colour.