This manual is the first comprehensive account of Brazilian Portuguese linguistics written in English, offering not only linguists but also historians and social scientists new insights gained from the intensive research carried out over the last decades on the linguistic reality of this vast territory. In the 20 overview chapters, internationally renowned experts give detailed yet concise information on a wide range of language-internal as well as external synchronic and diachronic topics. Most of this information is the fruit of large-scale language documentation and description projects, such as the project on the linguistic norm of educated speakers (NURC), the project "Grammar of spoken Portuguese", and the project "Towards a History of Brazilian Portuguese" (PHPB), among others. Further chapters of high contemporary interest and relevance include the study of linguistic policies and psycholinguistics. The manual offers theoretical insights of general interest, not least since many chapters present the linguistic data in the light of a combination of theoretical and methodological approaches. This rather unique feature of the volume is achieved by the double authorship of some of the relevant chapters, thus bringing together and synthesizing different perspectives.