[dai_pole]

There's a difference between writing a book and formatting one. For writing you can use anything as long as you can export it to txt/rtf - rtf being the standard in the print world - even vi/vim is usable for this purpose.

For formatting the standard in the print world is InDesign, nothing else comes close. I used to work in the "print" trade, and that is what everyone uses.

[thejteam]

I will second InDesign. I was having a conversation not that long ago with somebody who used to work in the printing business and that is what she used. And she had horror stories of people trying to do things with Word and HTML.