I am selling this because I passed the exam in the spring of 2025. There are no markings, and the condition is quite good. This is my recommended set for passing the exam. ① Key Countermeasures Book for knowledge and trend understanding & past questions for at least 5 years ② Murakami Moto (I bought it on Kindle and read it on my smartphone during my commute) 5 times ③ Textbook on Security Technology and syllabus for acquiring detailed knowledge I believe that by completing ① to ③, you will be able to sufficiently handle the latest trends. Thank you for viewing.