There’s no shortage of places that want to sell you digital books, but Amazon’s Kindle store is a relatively safe bet considering that the company has built apps for just about every portable device out there.
The Kindle Android app features newspapers, magazines and books, and synchronizes the last page you’ve read with any other Kindle-enabled devices you own.
Link: Kindle
Similar Apps: Google Books, NOOK for Android by B&N, Audible for Android
More on Time.com: The 50 Best iPhone Apps for 2011