I came across The Great Believers and I Have Some Questions For You in separate recommendations months apart (possibly at least one of them from the Ask-a-Manager blog, where I get a lot of non-genre recommendations). I loved I Have Some Questions For You - it is not the only recent and thoughtful boarding-school retrospective I've read lately, but I think it's the best of them, even better than Tana French's The Secret Place. But The Great Believers was such a singular book that I wasn't sure how to describe it or think about it. I appreciate what you've said about the present-day providing some ... I don't quite want to say perspective or context, because I really don't want to tidy up the awfulness of the 1980s ... but, yeah. What you said.
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