There was some light writing on the first few pages, which I erased with an eraser. I've included photos of the pages where I erased the writing. I apologize if I missed anything, but I think the contents are clean enough that there shouldn't be any problems with use. This is a problem book featuring a thorough analysis and problem explanations for the Mathematics Certification Level 5. - Title: Pass! Mathematics Certification Level 5 Revised Edition - Publisher: Gakken - Problem Type: Calculation problems - Target Grade Level: Elementary School 5th Grade - Contents: Mathematics Certification practice problem book - Features: Includes thorough analysis and problem explanations Thank you for looking.