Set of 2 books Ideal for systematic advanced study of mathematics. - Title: Advanced Problem Solving for Mathematics I+A+II+B - Title: Advanced Problem Solving for Mathematics III - Publisher: Obunsha Thank you for viewing! - There are no writings, markings, or folded pages. - There are some minor scratches, damage, and corner wear due to aging and storage. ⚠️ No covers. - The images are taken under lighting. Discoloration of the pages and minor scratches may not be visible, and the books may appear cleaner than they actually are. - For those who understand that these are used books, thank you for your understanding.