David devotes his journalistic energies to denouncing such modern-day annoyances as grievance counselors, old people who don't have their fare ready when they board a bus, "women who wear headscarves," homeopaths and restaurant critics. Katie half wishes he'd undergo a "violent political conversion" and become a conservative ranting about "poofs and communists" because "it must be very unsatisfying to have such tiny outlets for his enormous torrent of rage." Here's how she describes to David a typical evening with their friends Andrew and Cam:

We walk in, and then Andrew says that so-and-so's a wanker and his new book is awful, and you say that the new film by somebody else is unintentionally hilarious -- even though nine times out of ten I know for a fact that you haven't seen it -- and Cam and I sit there smiling and sometimes laughing if you're being funny instead of just plain nasty, and then you get drunk and tell Andrew he's a genius, and he gets drunk and tells you you're a genius, and then we go home.

The specimen that Hornby has under consideration here, then, is the quintessential Angry Guy, albeit what seems to be a peculiarly British variation on the breed. In America, the Angry Guy is every bit as resentful as David but much less cautious. Instead of fulminating about headscarves, the American Angry Guy does things like send e-mails with what he imagines to be devastating ripostes to, say, any female writing for an online magazine who dares to suggest that a woman's lot might consist of something more than pregnancy and bare feet. Whatever the wording of those e-mails, they all communicate the same information, which is: "I got the worst of a nasty divorce from a woman who now makes more money than I do and has since married a man who's got better things to do than sit in a grubby recliner all day watching Fox News and thinking up taunting messages to e-mail to total strangers."

David does, in fact, undergo a conversion in the course of "How to Be Good," and it's a transformation that prompts him to tell Katie, "I'm a liberal's worst nightmare." But that's not because he suffers from the conservative American Angry Guy's delusions of rhetorical grandeur. It's because he truly has become a liberal's -- specifically Katie's -- worst nightmare, something far scarier than a crank who's picked up a couple of taunts from Bill O'Reilly. David is no longer an Angry Guy; now he's practically a saint. "I think everything that you think," he explains to his wife. "But I'm going to walk it like I talk it."

David's change of heart starts out as a bit of marital warfare, a bitter sport at which both partners are "highly skilled" according to Katie. Plagued by a bad back, he visits a healer named GoodNews, primarily because he knows it will mightily annoy his physician wife to learn that he's paid 200 pounds to a semi-indigent former DJ who cures people simply by touching them. However, the healing works, and spectacularly well. GoodNews even cures Molly of her chronic eczema, and when David learns that Katie is not only miserable enough to be considering divorce but has also been having an affair, he goes back to GoodNews for an overhaul of his psyche.

Maya Angelou reads from "The Heart of a Woman"