Side by Side Level 2 Extra Edition I bought the textbook with the CD, but I hardly used the CD. This is a listing for the CD only, so please be aware if you need the textbook. Recommended for those who forgot to buy the CD version, or those who bought the CD-less version but wished they had the CD. (Reference) Current Amazon prices as of February 2026: Textbook with CD: 2900 yen Textbook without CD: 2560 yen ☆The CD case is not in pristine condition.