This is a fun learning material with illustrations for idioms and four-character idioms. There is a crease on the cover, but it is unused. - Title: Idiom Classroom - Title: Four-Character Idiom Classroom - ISBN: 978-4-09-291706-6 - ISBN: 978-4-09-291704-2 - Contents: Learning material with illustrations - Number of pages: Approximately 80 pages each Thank you for looking.