I bought this book in September and having read the letter F until I find it very interesting. But then what do I see? There is neither the letter nor the letter G H but instead, D and E and F. So that I end up with a completely incoherent book especially as it moves from number 144 at 193. In short it's all mixed, I have 2 times the same letters, missing pages and I can not find my way. I am extremely disappointed especially because he started very well.