This book reminds me of the collection ... en 30 seconds, a collection where they summarize a subject by different themes/persons/categories. Except that the 30 seconds collection does it better. Here the information are good but it’s more the organization and the way it’s presented that is harder to follow and not that well put into place. A better edition might have done the job. I also had trouble reading it on my Ipad, because at some page the app shut down without any reason and I had to restart it back (and I know reading dozens of books a month on that app that it isn’t the problem, the book definitely was)