“For me, as a literary experience, they are akin to sloppy seconds, a salad bar in a staff canteen at the end of a hot weekday, or a recently-vacated cubicle in a public toilet. I've lost count of the amount of times that I've been confronted by the dried-up bogey of the previous owner, smeared across one of the pages.”

I’m a little less keen on them myself now, thanks Chas.