This is a set of two books: "Hidden Techniques for Entrance Exam Arithmetic" and "Hidden Techniques for Entrance Exam Arithmetic: Geometry Edition." The Geometry Edition comes with flashcards! I used these books when studying for junior high school entrance exams. The content is easy to understand, and I highly recommend them. There are no markings inside, and the pages are clean, but the covers have creases from being used like textbooks. I ask that you understand these are used items stored at home before purchasing. Thank you for looking.