THE 4.e3 NIMZO-INDIAN by Carsten Hansen
An impressive book on a confusing and difficult subject. If you play either side of this opening, you won’t find a better book on the Nimzo. (1600 to grandmaster)
NIMZO-INDIAN KASPAROV VARIATION by Chris Ward
Ward, who successfully played this anti-Nimzo system for years, gives away his secrets in this lively, instructive, fun, and informative book. (1600 to grandmaster)