I am happy to have met this book and having traveled with great delight, though, I'm a little on my hunger like other players, because comments to the subject of the book does not quite correspond to reality . It remains for the reader to continue his own research if he wants to finger the work of Mr. Lakhovsky. Book of "extension" without a doubt, I'm pretty sure that the author did not have the right to disclose details it would have liked ....