Which format should authors publish their books in – and why?
Many authors will simultaneously release a book in multiple formats. At the very least, they will have a print and digital edition published at the same time. Others will do an audiobook, perhaps a little later on. Some will publish hardcover and trade paper at the same time while some may only do a mass market paperback edition. There are also publishers who release a print-on-demand version while selling the digital and audio book editions.
What makes sense for you?
How To Ebook 
Reblogged this on Author Don Massenzio and commented:
Check out this useful post from the How to eBook blog with help on deciding what format in which to publish your book