Astro Boy (along with some of his supporting characters) appear in a series of "edu-manga" that tell biographies of famous personalities such as Helen Keller, Albert Einstein and Mother Teresa. Astro Boy and his "sister" appear in prologues and epilogues for each story and learn about the famous person from Dr. Ochanomizu, who acts as narrator for each installment. These manga were published by Kodansha, Ltd. from 2000 to 2002 with English-language versions published by Digital Manga Publishing and seeing print from 2003 to 2005.