This book is useful for diving and tide pooling, and also seems helpful for those who enjoy aquariums. It's a reliable item from Yama-to-Keikoku-sha. Although it's an older edition, it hasn't been used much, so it's in very good condition. I quickly inspected it, and found no writing, scratches, or stains. This item, originally priced at 2000 yen, is being offered at a reduced price.