Oooh, this blew my mind the other day. I caught up with my friend Ineke at a local café and interrupted her whilst she was reading. She was face-first into a tiny little book about the size of my hand. Turns out it's actually a full-length novel condensed down into small print and inked onto the page horizontally.
She assures me there are loads of novels printed like this, but it's the first time I'd ever seen one. I think it's the compromise for people who don't like Kindle. You can certainly fit a lot more of them in your bag.
Is there a word for this print format?