this book is a dictionary model; 60 models are listed and summarized; A bibliography is appended to enable deepenings; having worked on some of these models during my studies, I appreciated the precision and rigor of the presentation; it is a concrete and effective book; presentations are made in short and precise sentences; women answer questions - What is the theme of the model? - When to use? - How to use it? This presentation makes it possible to quickly determine if the model of interest to us and if we want more this book seems destined fundamentally to students: classification into 3 types: - Strategic models, - Tactical models - Operating models allows direct access depending on the subject on which you want to work. However, it seems to also be a "bedside book" for managers to enable them to get high and generate an interesting thought. Indeed, it presents the reflections of researchers who "thought differently" and thus opens with questioning!