Create an App for your eBook. One of the more complex methods of publishing your ebook to the iPhone is to create an iPhone application for it. This will enable your customers to purchase it from the App Store, and it will be downloaded and readable from their iPhone or iPod Touch at any time. This is the original method for creating an eBook on the iPhone, since the introduction of the Kindle for iPhone. The iBooks Bookstore didn't come until much later.
Self-publish your eBook with the Amazon Kindle. The Kindle is a portable eBook reader from Amazon.com. It's also an application that can be downloaded to the iPhone, your Mac or PC, the iPad, and even the new Android phones. Due to the wide variety of devices that can run the Kindle and the fact that you can set your own price, the Kindle makes your eBook available to the widest market, which makes it the most beneficial method if you have to pick just one to publish with.
Self-publish your eBook to the iBooks Store. With the release of the Apple iPad and the iPhone 4.0 software update, the new iBooks Store enters the market of eBook providers. This new application was designed specifically for the iPad, but it's also functional on the iPhone. With the growing popularity of these Apple devices it makes publishing on iBooks worth the time and effort. To publish with the iBooks Store you'll need to have a Mac computer that meets the minimum requirements. If you publish with the iBooks you'll be able to set your own price, and your book will be available for quick and easy purchase and download on the iPad and iPhone.