According to Raww Le Klueze, global admin of the Suikosource forums, there is a secret 10th Old Book. There is no known button combination to access it, and acts more like a hidden programmer message with only one page. Translated to English, it reads:


Hideo Nomo was a Japanese baseball player and a starter in the 1995 Major League All-Stars game in the United States - the same year Suikoden was released in Japan - and is known as the first Japanese citizen to join an American major league team after having played professionally in Japanese major leagues.