Book of ~ ~ Oh Fountain of Trivia (18) (2006) ISBN: 4063527468 [Japanese Import]

Japanese

Tankobon Softcover

ISBN: 978-4-06-352746-9

ISBN-10: 4-06-352746-8

Kodansha
See also:
2004単行本（ソフトカバー）トリビアの泉~へぇの本~(8)
 Tankobon HardcoverBook of ~ ~ Oh Fountain of Trivia (19) (2007) ISBN: 4063527476 [Japanese Import]