Kenneth Branagh has brought Agatha Christie's gentleman detective Hercule Poirot to life in three movies, but one is clearly the best.

That left us with the question of how to get books back on her cherished DX. The Kindle DX has a 9.7-inch display. While she does have a more modern Kindle she could use, it's not that big.

Whether you're considering joining the digital book revolution for the first time or simply want a new ebook reader, these are our top lab-tested picks for every type of bookworm.