Very clear principles of associations of ideas that result in true method to retain the lists (or what to retain in a precise order and may number 1, 2, 3, etc.). My personal interest, as a singer, had to memorize many songs in French and English. In just a few days, I made much more progress than in the two previous months. So yes, it works. Well, well!
Cons: The last thirty pages, cliches collection of all kinds, such as "de-stress" (probably snapping fingers), make a vacuum, etc. The end of the book is without any interest.