Tankbooks are the same size and format as cigarette packs. Marketed under the banner, “Tales to take your breath away,” they arrive fresh on the heels of the recent UK smoking ban.
It’s hard to say what sort of readability these things are going to have, considering the small form factor. They are pretty cool as objects, but I’d probably feel a bit poncy reading such a tiny little book in public. That said, if you can pick ’em up for a few quid, it would be worth considering. Especially if they’re available from a cigarette machine.