hello, I used advice in this book all winter, for my family, friends and for me !!! it is constantly at hand ... I like the next "easy" and very convenient without having to buy an extraordinary amount of ET, the author provides a wealth of detail for each of HE, which are quite known and can be found everywhere ... eg this winter to strengthen the defenses and prepare to fight against the virus ..... ravintsara, or to treat muscle contracted, wrinkled ... Gautherie ..... my husband was first surprised that "it works!" I got a friend of Canada last month, she found that this book was going to basics ..sans again lost in a product infinity ... I have therefore ordered him .... ..elle is delighted !!!!!