The author focused in his first volume of pure chess calculation on middlegames. Romain has carefully selected 496 positions, which arose in real games in the recent past. He separated the exercises into 11 different categories, covering both tactics and strategy, attack and defence. This book is a fantastic training tool for any player to improve his level of chess thinking. The concept is unusual but effective. I tried it this way every evening for a week, doing 3 or 4 easy puzzles before attempting some harder ones, and it worked beautifully. Edouard clearly invested a lot of time in selecting the examples. All in all, an enjoyable book of exercises that put me in a good mood for playing: GM Matthew Sadler, New In Chess Magazine 05/2017 - 4 stars rated.
Edouard's book is an advanced workbook for the ambitious improver. John Hartmann, CHESSLIFE 08.2017.