Cheap and convenient storage (the book is tiny), the guide Rachel Frély worth all the advice of grandmothers of the world! Although it requires a range of products "base", such as the indispensable soap and white vinegar (as such, these products are extensively detailed in the first part of "ingredients"), all "recipes" explained in this booklet are ultra-economic and preserve the environment. No need to buy dozens of expensive chemicals, because natural cleaning products presented here are just as effective, or more. I especially liked the part about the tasks, the result exceeded all my expectations and surpasses any stain sold in supermarkets. A fruit stain on my white T-shirt: A little white vinegar and Aleppo soap and voila ... And what about this scholar Marseille soap mixture, water and oil lin to clean the lino! Unlike other books, the book focuses on the essentials and is not cluttered with illustrative pictures which often take half of the book. Here, everything is lectured (tasks, floor, furniture, kitchens, jewelry, etc.) and perfectly clear. In short, a book that I recommend because it is a sustainable investment!