From 1977 to 1997, Kodansha published almost a full library of Osamu Tezuka's works which included Unico. In 1983, the first two Unico books were released. The third book, which featured the Shogaku Ichinensei comics, would come out ten years later in 1993.
Title: Unico 1 (vol. 285)
Title: Unico 2 (vol. 286)