How to emmbed font in your epub books?

Today more and more ereader start to support epub format books. Sony’s ereader even only support this type. And you also can download 1million free epub books on google books. Epub maybe the most popular format in the future. But now many device only support English characters. If you want to read other language’s books, or if you just want to change the font, you have to embed your font in to that book.. there is one software that can do this job,the epubbuilder,developed by a Chinese engineer. You can import a book in the format of epub,txt,html,and chm,and transfer it to a epub or pdf and many other format. But this software has got some bugs,coz the writer don’t have to many time on it . and it is all for free. Download it here.