- Title: The Encyclopedia of Sad Creatures - Author: Tadayasu Imaizumi - Volumes: 4-volume set - Language: Japanese - Features: Humorous explanations of animal evolution and ecology - Target age: Children Thank you for viewing. The Encyclopedia of Sad Creatures More Sad Creatures Even More Sad Creatures The Most Sad Creatures 4-book set Some of the covers have been cut. There is a feeling of use, such as wrinkles, scratches, and small marks. There are no writings or names inside. The books will be put together in a waterproof bag and shipped in a size suitable for posting. Please purchase if you understand that these are used items. Please see the profile for other precautions. Thank you.