Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Apontamentos de estudante

This book resembles my apontamentos de estudante (student notes) when I was a beginner learner of Portuguese. It is far from being an authoritative grammar book that will lead you to the mastery of Portuguese, as it appears to think it is. It lacks the background knowledge of the language that will enable to streamline what is important and what comes second. It is very much, as I said, a tentative work of a beginner learner, not the competent guide a master can devise. Not good enough.As someone who can speak the language quite well, I was asked my opinion on this book. That is how I came across it. Here it is my opinion, not just for the learner who asked me but for all the learners looking for good books who may read this review. Look elsewhere is my advice.