Thanks for your answer, sherman.
All those info are useful to me as I learn the making
I am now referring to
Jedisaber as I learn very basic stuff in epub format, but I am confused that i fail to make a recognizable epub file.
I check my file with threepress, it report to me that my minitype file is "not the first" in the epub file, what should i do to give it a "first place" in the zip file layout?