A practice book that thoroughly explains basic biology problems, perfect for university entrance exam preparation. While the Standard Problem Seikou (the blue one) is quite advanced, this book offers a collection of basic problems that can be used to solidify your foundation. There are no markings or writings. The only stains are on the parts shown in the photos, so I don't think there are many. - Title: Biology Basic Problem Seikou - Author: Toru Omori - Publisher: Obunsha - Edition: Fourth Edition Thank you for looking.