“Ocean Frontier” is a special issue that provides deep insights into ocean exploration and ecosystems. Its appeal lies in its exploration of the mysteries of the sea, accompanied by beautiful photographs. Thank you for viewing. I have read it once and am listing it for sale. There are some minor scratches from storage. I am looking forward to purchases from those who understand that this is a home-stored item. ● Shipping will be done with simple materials I have at home, and the item will be compressed for packaging. Please refrain from purchasing if you are seeking perfection. ● Basic shipping will be via Mercari delivery, but it may be changed depending on the circumstances. ● I work full-time on weekdays, so shipping will be on the weekend at the earliest. I will try to ship as early as possible if circumstances allow.