In the early twentieth century, there were medicines to cure everything that ailed you. Many of them contained lots of alcohol, or a variety of opioids and other random root extracts. Hard to know if the medicines were effective or if the users were just drugged out and couldn’t feel any pain. Regardless, they lived in a time of gorgeous typographically oriented packaging.
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.