Queen's Gambit Declined: Vienna

Krzysztof Panczyk is a leading chess theoretician, well known for the depth and thoroughness of his analysis. He is an international master and has been awarded a medal for outstanding services to chess by the Polish Chess Union. His collaborator, Jacek Ilczuk is a senior international champion in correspondence chess.

If you play the Queen’s Gambit Declined Vienna Variation, then you need to keep this book on hand. It will be your reference volume for a very long time --- Mark Donlan, ChessCafe.com