This is a textbook covering the necessary knowledge for scuba divers. * 7th edition, 3rd printing, issued January 18, 2024 I am selling this because I have already obtained the certification. Would this be suitable for those aiming to get certified? There are a few pages with writing and underlining, as shown in the fifth photo, but I don't think it will interfere with reading or solving problems. Also, the inside is clean, but there are some folds on the cover. Please check photos 6-8 before purchasing. - Title: Scuba Diver Textbook - Publisher: Central Labor Accident Prevention Association - Price: 2750 yen It will be packaged with waterproof protection and shipped via Nekopos.