Materials to strengthen grammar and conversation practice. - Title: SIDE by SIDE Extra Book 2, 3, 4 (Extra Edition) - Authors: Steven J. Molinsky & Bill Bliss - Contents: Includes grammar, conversation, vocabulary, and exercises - Price: 2900 yen per book on Amazon (8700 yen for 3 books) * No writing inside * Books 2, 3, and 4 are in good condition. * Book 1 also has no writing, but as a bonus, it has a torn cover and page 5 is torn (repaired with tape), and a tear of about 1cm on page 15 (can be removed if not needed). Thank you for looking.