The ISBN of The Otaku Encyclopedia is 9784770031013.
The ISBN of Dinosaur Encyclopedia is 0789479354.
The ISBN of Conspiracy Encyclopedia is 1596091568.
The ISBN of The Encyclopedia of Fantasy is 978-1857233681.
The ISBN of WWE Encyclopedia is 075664190-X.
The ISBN of Encyclopedia of American Religions is 978-0787696962.
The ISBN of Encyclopedia of Conifers is 978-1-907057-15-1.
The ISBN of Encyclopedia of China is 978-7-5000-7958-3.
The ISBN of The Soap Opera Encyclopedia is 006-101157-6.
The ISBN of Encyclopedia of Domestic Animation is 5-9265-0319-4.
The ISBN of Encyclopedia of Serbian Historiography is 86-80269-35-2.
The ISBN of Great Olympic Encyclopedia is 5-94299-088-3.