It hits a lot of formal sweet spots: It’s shelved as fantasy, which I appreciate, but it’s effectively a YA book, and although I’m glad for me that it wasn’t categorized that way (because I would probably have passed it over), I’m a little sad for the YA readers who won’t be reading it—and a little bit for Walton, because I think it could have been a bunker-buster. It’s also a proper British boarding school story in the vein of “Such, Such Were the Joys” or BOY or STAND BEFORE YOUR GOD (if it’s fair to call an essay and two memoirs the same thing as a novel), which I appreciate largely in comparison to Harry Potter, not that Harry Potter doesn’t do a decent job. And it’s a coming-of-age novel in a quiet way, and a love letter to classic sf, and also a Lupine puzzle where the things a common-or-garden fantasy author would have lavished thousands of words of hard-sweated description on are instead offscreen, in the past. So there’s a lot to like in its various approaches. And Mori Phelps is a great character—damaged and vulnerable in some ways, but also smart and opinionated; doesn’t suffer fools but sociable with her people. Plus great taste in sf, can see fairies.
On first reading, I’d say it’s not perfect for my taste; a bit too much is left to wonder about Mori’s mother, her twin, and the nature of the fairies, and the basic issue of the “reality” of magic is left totally unresolved. But I wouldn’t trust either of those judgments. First, because they’re both solidly de gustibus, and second, because I’m not sure they’re even right. If Gene Wolfe had written this, in fact, I’d be confident that they were wrong. And I think I’m willing to trust Walton as much as Wolfe. So I think I’ll be reading this again in due course, with a magnifying glass, paying close attention. And I think I’ll be giving it to my daughter in a decade and change, or sooner if I can.