This is a 4-book set of valuable fish identification guides and diving manuals from the 1990s to the 2000s, including works by Kazuo Masuda, an authority on fish photography. Some of these books are now out of print, making them valuable resources for understanding the ecosystems and distribution of that era. How about them for those who enjoy fishing or diving, as learning materials for children who love fish, or as part of a collection? [Set Contents] Yama-kei Field Books 6: Marine Fish (by Kazuo Masuda) A classic masterpiece that is portable yet packed with information. Shogakukan Field Guide 2: Japanese Fish (Marine Edition) Features beautiful photographs that are helpful for identification (determining fish species). Obunsha Outdoor Observation Guide 4: Fish A nostalgic learning guide with explanations easy for children to understand. Leisure Scuba Diving (2nd Edition) Supervised by the Japan Coast Guard's Rescue Division. A resource for learning the basics of diving. [Condition] There is age-related deterioration due to long-term storage (scuffs, yellowing, etc.), but they are readable. *Individual sales are not currently being considered. This set is offered at a lower price for bulk purchase.