ðə pˈɪktʃɚ bˈʊk sˈɪɹiz, pˈʌblɪʃt baɪ kˈoʊdænʃə, lˈɪmɪɾᵻd., hˈæzbiːn ɹᵻlˈiːst ɪn dʒˌæpənˈiːz ɪn sˈɛvən vˈɑːljuːmz.
The picture book series, published by Kodansha, Ltd., has been released in Japanese in seven volumes.