Question: Is there any textbook for learing French that are based on the natural method?
What's the natural method, you say? It is a method of learning the language like a child would, that is the textbook would be all in French and would be very easy to read at the beginning, even with no previous knowledge of the language, and then progresses to more advanced texts. There is no translation excercises, no explanation of words or grammar in your mother tongue – the point is to get you to immerse yourself into the language, to start to think in the language. Words that might be difficult are explained by illustrations. Hans Ørberg's Lingua Latina per se illustrata (something like "Latin illustrated in itself") is a perfect example: