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I Married a Communist was widely "known" to be an allegory, set in the McCarthy era, of Roth's real-life marriage to and divorce from Claire Bloom, which was apparently very messy, unpleasant stuff. Roth's novel was in retaliation to Bloom's 1996 memoir, Leaving the Doll's House.
I may revisit Roth's trilogy at some point, but I've written this much so far only to give some context for the real object of this post: Roth's reaction to an essay about literary biography in the New York Review of Books by John Updike which rehearses some of the allegations Bloom made about Roth--"...adulterous, callously selfish, and financially vindictive" is not nearly the whole of it--in her memoir.
Updike's essay is available free only to subscribers, but Roth's complaint and Updike's brief reply are available here. There's a lesson about clarity in writing--and the (mis)perceived slight--in there.
Sticks and stones may break one's bones...and words can be pretty hurtful, too.
--Marshal Zeringue