The cover is creased, but there are no markings inside. I am a private seller, so there may be oversights. For those who understand home storage. [Summary] "My Jeck Arithmetic 5" is a textbook for thoroughly learning the basics of arithmetic. It features easy-to-understand explanations and a variety of problems to enhance learning effectiveness. [Target Age] This content is for elementary school students, especially suitable for 5th graders. It covers a wide range from basic to advanced concepts. [Purpose of Use] Ideal for home study or as a supplementary textbook for cram schools. Recommended for those who want to deepen their understanding of arithmetic and improve their academic ability. - Title: My Jeck Arithmetic 5 - Brand: CKT - Color: Blue Thank you for viewing.