Hi, In Amazon.com, there is `The Ruby Programming Language' page, and the page say 'This item will be published on January 12, 2001'. Is it on sale now? http://www.amazon.com/exec/obidos/ASIN/020171096X/qid%3D980398758/102-6643164-5561754 And who is `Yukio Matsumoto'? Is he translator? or misprint? Or is it pan name of Keiju-san? :-) TAKAHASHI Masayoshi (maki / inac.co.jp)