Right now, the only books which provide this appearance in Kindle are going to be 'comic books,' 'children's books' and 'textbooks' that are created using Kindle software from EPUB3 or PDF originals. All others are going to be 'flowable' EPUBS and are going to have the vertical, one page at a time appearance. Kindle for Mac on the App Store – this is a download link for Mac users who prefer to get the Kindle app from the Mac App Store. Kindle for PC installation instructions – if you have problems with installing the Kindle app on your PC, had tot his section of Amazon Help Pages.

I had the same question as the OP and this answer was very helpful But now that I've downloaded the app on my iMac I cannot register the app to my Amazon account. Within the last couple of hours I've downloaded the Kindle app to my iPhone and iPad and easily registered both. But the iMac won't register. It seems to reject my password even though it's the same password I used on the other Apple devices and also when i purchased a book this morning. My understanding is that up to six devices can be registered. Does anyone have an idea what is going on or how I can contact Amazon/Kindle for help? Thanks very much.

If you’re a book lover then you’ll already know about Amazon’s Kindle app which allows you to read Kindle ebooks on any Android, iOS, Windows Phone or BlackBerry devices. While the app usually works great, there’s a minor annoyance that many of us have faced. When you’re on the couch or lying down in the bed, then you might have noticed that the screen will automatically rotate between portrait and landscape modes, and sometimes this makes reading more difficult. Wouldn’t it be great if we can just lock the screen to one orientation so that the screen won’t rotate automatically? This is very useful if you move around a lot and don’t want the screen to automatically rotate. Simple trick to disable screen rotation in Kindle app The good thing is that there’s a simple trick to disable screen rotation in the Kindle app, and enable it when required again.

Here’s how this can be done. Launch the Kindle app on your Android or iOS device and open the book of your choice. Tap on the lower right corner of the screen and you will notice a little padlock icon. When this icon is visible, tap on it to lock the screen on the current orientation. Once this is done, the screen won’t auto-rotate no matter how you hold your device. When you want to rotate or lock the screen in other orientation, then simply tap on that padlock icon again to unlock it.

Once unlocked, auto-rotation is enabled. Note that if you’ve disabled auto-rotate on your device, then this setting won’t have any effect. The global setting of the OS will override the app’s setting. To use this padlock option, you’ll need to enable the rotation in the OS first.

With this small but useful trick, a minor annoyance is solved in the Kindle app. Now your screen won’t auto-rotate unnecessarily.