In this book Grandmaster Sadler explains the ideas behind the Queen's Gambit Declined, one of Black's most dependable replies to the queens pawn. He discusses all of the major variations in popular practice, explaining the key plans and ideas and highlighting important recent developments.
I gave my goddaughter Sophie a copy of this book for Christmas, and simultaneously bought one for myself. We're going to learn the QGD together. This should be interesting... I have played the White side a few times, generally starting with 1. Nf3, but I have next to no experience as Black. When I played seriously back in the 70s and 80s, my main Black defense to 1. d4 was the Grunfeld, and I sometimes played the King's Indian. These days, when playing quick games on ICC, I have gravitated towards 1... d6 and 1... g6, which don't require you to know much theory. But all that is going to change :)
Sadler's book is highly regarded, and I can see why. It's well organized, with a nice Q&A style of exposition that should make it accessible to lower-rated players. The analysis however looks fairly deep, and hopefully will give me sufficient depth of preparation for my opponents on ICC, who are typically 2250-2450. I will report later on its suitability both for Sophie and for me!