Second in a two book series of chess openings, this volume contains some of the lesser used and more questionable openings as viewed by experts in 1953. It is a companion to How to Win in the Chess Openings by the same author and is probably best considered as a collector's item today.
I.A. Horowitz was a highly respected author of chess literature and articles in his day. This volume is a continuation of the original How to Win in the Chess Openings which covers the most popular opening lines. Modern Ideas in the Chess Openings picks up and continues with the less popular openings. While the general knowledge of opening theory remains more of less the same, there have been alterations in recommendations since the 1953 publication of this volume. I would categorize this volume as more of a collector's item than a modern manual.