The Land of Nowhere

The only other admissions-themed book (and the one I was thinking about when I said that, I guess) is Admission by Jean Korelitz, which I liked a lot, but I read it a long time ago and also (as I said) love these kinds of books, so I have no idea what another person would think (or even what I would think if I reread it :) )

In the genre of more straight prep-school books, the two that come to mind right now are Prep (Sittenfeld) which I remember liking but thinking was a little more sharp-edged than I ideally enjoy, and The Fortunate Ones (Tarkington), which had fun prep school and dysfunctional rich people stuff, but also had some really odd pacing which didn't work well.

ETA: In the vein of boarding-school books, you've read the Antonia Forest books about the Marlow family, right?