A textbook that clearly explains the basics of biochemistry. I looked through the pages and didn't see any writing. I think there are no noticeable stains or scratches. The upper corner of the cover has a tear and a scratch of about 1-2 mm, as shown in the photo. - Title: Easy-to-Understand Biochemistry - Authors: Hiroshi Hayashi, Hiroyuki Suzuki, Mariko Shida, Masako Ito, Rie Kega - Publisher: Sankyo Shuppan - First Edition Published: April 20, 2005 - ISBN: 4-7827-0497-6 Thank you for looking.