I’ve found a solution – which is FREE.
Unfortunately, it doesn’t work for all books, but does work for some books. Here are the resources I’ve found.
To view on your iPhone or iTouch, you need to download the free app – iBooks. Download the book to your computer in EPUB/Nook/Stanza Format – then drag it over to your iTunes library. Your book will now appear on your bookshelf and will open up for you to read.