There is both Kindle and Nook software for Android in the app store, they both work well and you can access all of your Amazon content this way. There is a setting for allowing the orientation to change based on how you're holding the tablet, but not all programs will change. Look in your settings for the "device" settings and check "auto rotate screen". This will work for most Android apps - I hope this helps! I've a Galaxy Tab 4 (10.1), not the S2 but that shouldn't matter.