Still grieving the death of her husband Fred two years earlier, FBI agent Lina Connerly welcomes the chance to relocate to Paris with her teenage son Rory. Officially, she’s posted to the American Embassy to liaise between U.S. and French counterintelligence. Unofficially, she’s also tasked with hunting down Calvin Cook—a fugitive American intelligence officer who leaked classified documents, fled to Russia, and is now rumoured to be somewhere in France.

Rory and Lina are still exploring their new life in Paris—Rory’s new school, the wonderful crêpes near their Haussmann apartment, the inexplicably bad pastries at the embassy cafeteria—when her French counterparts pull her into a case they cannot crack: the mystery of the Train Fantôme. Twenty years ago, nine passengers were found dead in a single metro car, with no clear cause of death. Now, construction workers have recovered a mysterious device from behind a tunnel wall, and an old source of Lina’s has resurfaced with intel connecting it to a secret weapons program. What if the threat didn’t end with the lives of those nine passengers?

Meanwhile, a celebrated American chef gives Lina her first real lead on Cook—and, for the first time since Fred’s death, the possibility of romance. But then people Lina recruited—assets she swore to protect—start turning up dead. The fugitive she’s hunting is burning their identities one by one. With the Train Fantôme still unsolved, a summit of world leaders just days away, and no backup from Washington, Lina is left alone to decide exactly how far she is willing to go to honor the promises she has made.

Praise for The Wonder Test:

“A madcap suspense novel with a clever premise . . . high-spirited, riveting. It combines the relentless, competitive pressure of growing up in affluent Silicon Valley suburbs with a future already coming round the bend. By blending the speculative and the familiar, Richmond makes us believe.”—San Francisco Chronicle

“A witty blend of satire and thriller . . . The grounding presence of Lina and her son keeps the story on track as it speeds to a conclusion that’s both harrowing and hilarious.”—Air Mail

“Ms. Richmond maintains a creepy sense of dread throughout, even as she explores Rory’s coming-of-age and Lina’s coming-to-terms.”—Wall Street Journal

“A gripping blend of danger and sharp social commentary on high-stakes education, the 1%, and suburban tropes: imagine a coffee date with Lisa Lutz’s Spellmans and Tom Perrotta’s suburbanites in a sun-drenched Twin Peaks.”—Booklist (starred review)

“A two-in-one winner: a gripping thriller set in a Stepford-esque California suburb, and a story of surviving loss and building family bonds. With a realistic protagonist, well-described setting, and an uber-creepy villain, it will please readers who like their stories with action and heart in equal measure.”—Library Journal (starred review)

“Sharply written, subtly satirical . . . Vividly sketched characters, escalating stakes, and evocative prose distinguish Richmond’s latest, which explores themes of grief and greed.”—Publishers Weekly

“Captivated by the novel’s simultaneously tough and tender protagonist, FBI agent Lina Connerly. After this, I’ll read anything Michelle Richmond writes.”—Vendela Vida, author of We Run the Tides

“The Wonder Test features a terrific, clever, and timely concept, and Lina Connerly, a loving mother, is also exactly the kind of tough-as-nails heroine to chase down the truth. Gripping, frightening, swift as a bullet. The last hundred pages could give you whiplash.”—Dean Koontz, internationally bestselling author of The Night Window

“The Wonder Test is fast-paced and smart, thoughtful and full of heart. I never thought a book could combine the thrilling twists of a Sue Grafton novel and the literary complexity of the best Tana French, but Michelle Richmond has done it. The Wonder Test is a triumph and a joy.”—Amanda Eyre Ward, New York Times bestselling author of Lovers and Liars