PERMANENCE, by Sophie Mackintosh

Sophie Mackintosh’s novels are always speculative in some way, with either the author or her characters forging a world governed by its own logic and rules. In their boldness and their ability to convey the violence of patriarchy, they recall the work of Jacqueline Harpman — not only the cherished “I Who Have Never Known Men,” but also “Orlanda,” her wild riff on Virginia Woolf’s “Orlando.”

Like Harpman, Mackintosh has a spare and confident hand. Her work is sometimes described as dreamlike; certainly, its contours are sketched with rapidity and confidence and relatively little detail. Her prose operates according to the same principle, at once lyrical and precise, like this from her second novel, “Blue Ticket”: “On the ground was a dead rabbit, disemboweled. Still fresh, the dark loops of its insides glistening like jam.”

When Mackintosh writes about masculine power, she does so in a way that articulates both its seductions and its terrors. Her newest novel, “Permanence,” is less explicitly concerned with the structure of patriarchy, but it has the same erotic charge as her earlier work, the same preoccupation with social prohibitions and the thrill that comes from breaking them.

Like “Blue Ticket,” “Permanence” turns on a highly pronounced binary. In “Blue Ticket,” adolescent girls are issued either a blue or white ticket on the day of their first period. A white ticket denotes a future of marriage and children, a blue ticket one of work — even, it seems, a career. The divide is stark and self-evidently faulty, its coarseness an expression of the brutalizing regime the characters are trapped in.

“Permanence” features a similar opposition, neatly delineated. Clara and Francis are conducting an illicit affair. One morning, they wake up in an alternate reality where they are openly living together. The novel shuttles between these two worlds, one ordinary and familiar, the other a curdled paradise for adulterers.

The thinness of this “city of impermanence” — “fluid, cohesive and yet disparate” — emerges at once. The sky is “uncannily blue,” the newspaper bears no date, the edge of the city is marked by “a slick ring of water, as far as the eye could see.”

Still, a boundary cannot keep the other world from seeping in. Initially, elegantly, this is a problem in the structure of desire. Having been provided the life they dreamed of, in which their longing for each other is fully met, Clara and Francis begin to experience, to their uneasy surprise, boredom and discontent.

Without absence, the intensity of their desire for each other wanes. They even begin, or at least Francis does, to long for the relief of their ordinary life: “Another day ahead of them of petting, giggling, lying around. It seemed insubstantial suddenly, though only the day before he had felt he could do it forever.”

Soon enough, it becomes clear that the problem between Francis and Clara doesn’t lie in the outside impediments of the world they live in, but in their relationship itself. Francis remains troublingly himself — a married father of a small child, reluctant to leave his family, however much he is in love with Clara: “He did love her, and he did want to be with her. … But he already had reality elsewhere, reality which he sometimes felt trapped by, he would admit, but which he could not truly imagine cutting loose.”

“Permanence” might seem like an outlier in the current array of articles and books about open marriages and polyamory, and at first glance the line of distinction between the two worlds, much like the division between blue and white tickets, seems almost old-fashioned. But as Mackintosh persuasively illustrates, the familiar emotions of jealousy, infatuation and eventually indifference — these persist and can flourish in any relationship, however free of prohibition.

“You want this,” Clara tells herself, and then, “You no longer want this,” as it occurs to her that “maybe it was in absence that they loved each other best, and most honestly.”

In her work, Mackintosh devises scenarios that are bold and almost aggressively simplified. But her terrain is complexity and contradiction, and in her hands these oppositions twist and turn in on themselves.

It’s hardly a surprise when the central character in “Blue Ticket” decides to eschew her designation and have a child, declaring, “True and false were no longer opposing binaries. My body was speaking to me in a language I had not heard before.” Nor is it especially startling when discontent chases Clara and Francis from one world to the other, unraveling their relationship.

What is more disquieting is the surreptitious ease with which Mackintosh’s speculative worlds start to align with our own, allowing the reader to see how so many of the old prohibitions and conventions — around choice, around marriage — remain, somehow, firmly in place.

That moment of recognition, in a landscape that is startlingly alien, is the source of Mackintosh’s power as a writer.

PERMANENCE | By Sophie Mackintosh | Avid Reader Press | 240 pp. | $28