Judge whether the books other people post are good or not by the cover.
Book cover posters respond with whether they thought the book they posted was good or not.
(There is a web game Andrea James posted about last year called Judgey that lets you do the same thing automatically, using Good Reads ratings as a benchmark, if you want to do the impersonal version of this…)
That had better be good, because the cover is something else. I’m gonna guess, though, 1.5 out of 5 stars? (I’m not trying to guess the Amazon rating, though, more of what I think I’d think of the book.)