Manga:
The game was adapted into a manga by Shiro Amano, and all four volumes have been published in English in the United States by TOKYOPOP (ISBN 1-59816-217-9). A boxed set containing all four volumes has been released , as well as the second manga series, Kingdom Hearts: Chain of Memories. A noteworthy feature of the manga is that even in its original, Japanese language edition, it was designed to be read from left to right, contrary to the Japanese usage.
Here is a site of Manga scans in which you can read these volumes:
Manga volume
