How to Read Kindle Books without a Kindle? -- Kindle App for iPhone/iPod/iPAD: let you read Kindle books on your iDevices. Kindle also has apps for Windows PC, Mac, Android. You don't need a Kindle to read Kindle books.
Dropbox is a free service that lets you bring all your photos, docs, and videos anywhere. This means that any file you save to your Dropbox will automatically save to all your computers, phones and even the Dropboxwebsite.