~Main Categories~
B-1 Comparison (81 books) To compare different culture.
B-2 Tradition (129 books) To continue the original culture.
B-3 Generation (164 books) To connect different generations.
B-D1. At Home (173 books)
B-D2. At School (105 books)
B-D3. Communication (95 books)
B-D4. Others (226 books) ~self-development, community, global issues, humanitarian aid, environment, peace, etc.