The Ragozin Complex is a flexible and versatile chess opening system that, despite its popularity, rarely has been a subject of serious study in chess literature. A hybrid of the Queen's Gambit and the Nimzo-Indian Defence, the Ragozin featured in a famous book by Soviet theoretician Lipnitsky in the 1950s. Bobby Fischer decided to learn Russian to be able to read that work and immediately afterwards started playing the Ragozin.
1.d4 - Beat the Guerrillas! A Powerful Opening Repertoire Against Annoying Black Sidelines
This manual fills a big gap in chess literature. After 1.d4, probably the most widely played opening move in the world, Black can avoid main line theory by deviating into a whole variety of irritating unorthodox sidelines. White players often stumble into unknown and dangerous territory where their tricky opponent awaits them, fully prepared.