With the interactive e-book included in the paper book you will now have all the contents of the book in digital version as well. The interactive e-book also All the videos of the videocorso, with and without subtitles; All the videos of the veideogrammatica; All the audio tracks of the lessons and of the exercises; All the exercises of the videcorso, of the workbook and of the tests in the interactive version with auto-correction (over 200 exercises per volume). Softcover, 8-1/2" x 11", 240 pages.