The teaching and learning activity of the course is available in a digital study format, which supports the contents of the book by offering teaching resources that can be used independently or assigned by the teacher. The code on the cover of this book gives an 18-month access to MyLab, an interactive digital environment. MyLab allows the reader to access the online manual. This is the digital edition of the text enriched with features for customizing its use, activating the digitized audio reading and inserting bookmarks, even on tablets and smartphones.