10 books, volumes 11-20 of a total of 20 volumes. *Note: The total weight exceeds 30kg when all 20 volumes are combined, so they are being sold in two sets of 10 volumes each. (Volumes 1-10 are also available for 3300 yen)* - Title: Modern Elementary School Class Teacher Encyclopedia - Volumes: 10 books, volumes 11-20 of a total of 20 volumes - Contents: Classroom Education, Lesson Study - Publication Year: 1985 - Publisher: Gyosei *The outer covers show some sun damage, but as far as I can tell, the inside is clean with no writing or folds. I apologize if I have overlooked anything.* Thank you for looking.