It's very rare that I do that, but this was a nonfiction whose tone was annoying *and* when I fact checked the bits I could was obviously wrong, or at least, right in such a narrow set of circumstances as to be useless to me. (Yiddish Civilisation by Paul Kriwaczek.)

I've moved onto The Shadow Cage by Philippa Pearce, which I somehow missed earlier in my life, and is a book of short stories with a supernatural twist. Much more satisfying.