I was a bit skeptical at first as the reviews of the web said it really was not the top ... And infact, today is my little notebook reference grammar and teaches me a lot more than anyone What other Japanese learning book! A lesson, an application exercise and the new and old vocabulary to find in the lexicon (I used my internet app to revise the presented vocabulary) has each page! I have noted 2-3 small mistakes here and there (like forgetting a vocabulary word lexicon) but nothing major. In short, I recommend to those who like to start learning languages in the details through its grammar.