It´s a good reading, indeed. I got the "Como Não Aprender Inglês" and then, the "Como melhorar ainda mais o seu inglês." He shows deep knowledge of the minutes and subtleties of Portuguese, and have his books interpersed with experiences and anecdotes of his own life, they are funny and comes in handy to the learner of English.
He is the nice kind of guy. Some time ago, I had a question on English, that nagged me for awhile, I sent him an email and he promptly answered me. I recommend his books.