Robert,
I like how fast & small this is. I've only test a few books and the justification is pretty slick. Going to RTF is pretty cool too, if anything, so you can set Title & Author.
Of course anytime you put something out there, someone's going to pipe up with requests or suggestions, so here I go: If the app could take a guess at the author & title from the file name and pre-populate the text fields, that's be neat, even it it wasn't so accurate, it'd be an easy cut & paste for the user.
More fonts would be slick too.
I've found no bugs as of yet...
Thanks for the tool!