Rubem Lima has spent nearly five decades teaching Spanish and Portuguese. He has observed and cataloged all the problems that people have trying to learn the other language when kn...view moreRubem Lima has spent nearly five decades teaching Spanish and Portuguese. He has observed and cataloged all the problems that people have trying to learn the other language when knowing one of them. His work as instructional manager for a major US language company and as interpreter/translator in several languages has prepared him in unique ways to write a guide to handle this challenge.view less