From one episode to secondary appearance of the turbulent history of Poland the eighteenth century - the conversion of Jews at odds, followers of a false messiah who claimed reincarnation of Sabbatai Zvi - the author gives us a dizzying amount of information and ideas in a book, so, devours from the first to the last page. We discover the religious and philosophical foundations of the cult of Jacob Frank - after all, if he had as many supporters is that his message extravagant appearance corresponded to an expectation - the unsung role of Frankists and their descendants Poland, Germany and Croatia for two centuries, the extraordinary adventure of Frankist Junius Frey, banker, false true royalist and Jacobin. One downside: the author can not dwell on all the topics it addresses, and, suddenly, demonstrating links between frankisme and Naundorff is a little summary.