I have read both the upper and lower volumes. There are no markings. A two-volume set exploring the history of humankind by Yuval Noah Harari. - Title: Sapiens: A Brief History of Humankind, Volumes 1 & 2 - Author: Yuval Noah Harari - ISBN: 978-3-90229-293-0 - ISBN: 978-3-90229-294-7 - Number of pages: Approximately 500 pages per volume - Language: Japanese