Akahons (Red Books) for the University of Electro-Communications - Bundle Set of 5 books: 2009, 2012, 2015, 2018, and 2021 editions. Contains problems from 2006 to 2020, allowing those considering taking the University of Electro-Communications entrance exam to prepare with 15 years' worth of past questions. No plans to sell individually. Please refer to the images for any writing or stains. If you would like more details, please leave a comment and I will respond. Basically, for books with writing, I've included images of the most written-on parts of each book. For books without individual images, I couldn't fully confirm, but I didn't see any writing. Please forgive any overlooked writing. Please refrain from purchasing if you are overly concerned about condition. The books will be disinfected with alcohol before shipping. Thank you.