Includes bilingual CD & DVD. There are 4 textbooks in total, and 8 discs (4 CDs and 4 DVDs). I briefly looked through the textbooks, and there was almost no writing inside. As shown in the photos, there are some scribbles and stickers on the front and back covers. I have not checked the CDs and DVDs by playing them, so please refrain from purchasing if you are concerned about minor details. There is also a guidebook included, which explains how to proceed. As a bonus, I am including one English CD. Personally, I think listening to English passively from a young age is important! Thank you for looking.