"I found the selection of games and positions to be well-chosen and it was clear that the author had expended considerable effort to carefully review the material and build upon examples given earlier in the book. IM Esben Lund has broken new ground with a thought-provoking book on an under-represented topic in chess literature - the evaluation of positions featuring "Double-edged bishops". This book will be helpful for players rated between 1800- 2400 - stronger players could also benefit from being able to review many of these ideas and concepts in a single volume." -- IM James Rizzitano, ChessCafe.