Not true at all, you can buy the amazon
books which usually have the best price, but if you want to buy them somewhere else (ibooks or even kobostore) or get them for
free on project gutenberg or any other source all you have to do is to load them on an app called calibre (
available for mac, linux and windows) which will automatically convert the
books into the more appropriate format and send them by email to amazon cloud which will make them appear almost imediatly in your
kindle.
Kindles: Amazon has a larger catalog of modern
books because amazon has been in the e-
book market longer than anyone other.They have 2,00,000
Kindle exclusive e-
books with many from the famous authors who publish directly via amazon.There are not many choices to buy e-
books for the
kindle from other stores or
free book sites.The bought
books are stored in the cloud.Just keep the local copies of the
books.You can also lend a
book to a friend once for 14 days.Amazon also has
kindle lending library which is currently
available only to amazon prime subscribers.Thus via this service borrow
books and read without buying.You can also read e-
books loaned from the public libraries.Getting the loaded
books onto the device is simpler on
kindle unlike the nook.The
books can easily be downloaded wirelessly via whisper sync service (an AT&T 3G powered connection).