Ian McEwan secretly writes romance. He’s supposed to be a lit fic author, but most of the books of his I’ve read — The Innocent, Atonement, and Sweet Tooth — all function like category romances, with a bit of meta-fictional trickery (which isn’t exactly foreign to category romance either. The last of these I read, Sweet Tooth, even works as a kind of love letter to the fan fic wing of romance. The book is narrated by Serena Frome, a low-level operative in MI-5 tasked with secretly funding propaganda funds to likely anti-communist literary sorts. She falls in love with Tom Haley, a novelist she’s gotten into the program…and then (spoiler!) it turns out at the end that she isn’t actually the narrator; instead, Tom is the narrator writing as her. The romance trope of switching between male and female protagonist consciousnesses is both tweaked and perfectly fulfilled, as is the fan fic genre trope of telling the same story from different characters perspectives. It’s a tour de force, not because it upends romance conventions, but because it fulfills them so gleefully and perfectly. Quite possibly McEwan doesn’t read category romance or fan fic—but he has enough common roots with the genre that he understands them, and loves them and makes them his own— or, if you prefer, lets them make him theirs.

So it was with some disappointment that I read McEwan’s “Solar”and realized that it was not a romance. It’s just literary fiction. And you can tell it’s literary fiction not because it dispenses with genre tropes, but because the genre tropes of literary fiction are all in place. The aging priaptic professor and his string of wives; the jabs at academic politics, the ironies, the metafictional asides (the main character, Beard embellishes a story “not because, or not only because, he was a liar, but because he instinctively knew it was wrong to dishonor a good story.”) And of course the inevitable, drearily happy unhappy ending, where everyone figures out that the main character is a horrible person and all his lies catch up to him, and so we’re left dangling in media res with disaster delightfully coming. Yawn. It’s almost as drearily cliché as the end of Edward P. Jones’ “The Known World” where the last scene is of the characters literally gazing at a rich tapestry. No, really.

Genre fiction, and especially romance, is generally thought of as predictable and structurally uncreative. Lit fic requires idiosyncratic genius. But for McEwan, at least in the four books I’ve read, the opposite is the case. Romance seems to inspire him to play with the genre; to stretch it out and move the bits around, to see just how far he can push his characters and his readers while still retaining their love. In lit fic, though, the pretense of no formulas seems to mean he can’t even see the formulas, and so he just goes trudging through them, without even bothering with variation or wit or invention. The box you know is there becomes an inspiration; the box you refuse to see is the one that holds you.

This isn’t to say that Solar is utterly without merit; there’s an incredibly funny bit involving sub zero urination and the consequences thereof. But the amusing set pieces never add up to anything interesting, because lit fic’s non formula-formula robs McEwan of invention as surely as his main character is (inevitably) bereft of inspiration and genius. Without genre, lit fic is at the mercy of its formulaic conventions.