I've been using a Kindle for many, many years - after reading paper books for many, many years - and I've never wanted this, personally. One of the great things

I've been using a Kindle for many, many years - after reading paper books for many, many years - and I've never wanted this, personally. One of the great things about an ereader is its incredible portability. Even if adding a second half was a negligible size change, I wouldn't want to bother folding and unfolding the thing every time.