No need to leave a comment, you can buy it immediately. It will be shipped on the same day or the next day after purchase. It will be sent via anonymous delivery. I have other items for sale as well. Welcome to buy multiple items, a discount for the shipping cost is possible. [Product Information] Title: Calculus for Science and Engineering Author: Toshihiko Matsuki Publisher: Gakujutsu Tosho Shuppansha There are almost no writings in it.