The set includes 2 kursbuch, 2 arbeitsbuch and 2 dvd-rom in total. ? includes a2.1 kursbuch, arbeitsbuch and dvd-rom. the cd content of the arbeitsbuch is included in the dvd. includes a2.2 kursbuch, arbeitsbuch and dvd-rom. the cd content of the arbeitsbuch is included in the dvd. you can use ar technology by downloading the menschen application from the app store and play store and having the pages read. ar technology is augmented reality. it helps you listen to audio passages in your book by phone. mensch en a2.1 kursbuch - isbn-13 : 978-3193019028 arbeitsbuch - isbn-13 : 978-3193119025 mensch en a2.2 kursbuch - isbn-13 : 978-3195019026 arbeitsbuch - isbn-13 : 978-3195119023.to be sold at campaign price more than 5 stocks are presented. This publication is ideal for readers seeking insightful and educational content. Prepared by experienced authors and printed with high-quality materials. Great for students, educators, and curious minds.