Title: First, Assume the Cow is a Sphere. Author: Yuba Isukari Publisher: Kawade Bunko Published: September 10, 2025, First Edition ISBN: 9784309422138 Price: 980 yen + tax The book has only been read once with a book cover, so its condition is good, but it is still a used item. We kindly request that only those who understand the condition of the product proceed with the transaction.