I obtained this item from another seller. The "Strategy BOOK" and "Answers & Explanations" supplementary booklets from the "Pre-Exam Practice" materials originally had stains on the top. Therefore, the "Strategy BOOK" was masked with tape, and the "Answers & Explanations" were trimmed with a hole punch. However, I received the same materials from my school after purchasing these, so I did not use them. Please understand that this item has been stored at home and is as described above. Thank you for your consideration.