From the publisher:
An ambitious young woman insinuates herself into a tight-knit social set, shaking up friendships and marriages in a small seaside town. A frothy novel of love, money, sex, and friendship, from the New York Times bestselling author of Pineapple Street (“Laugh-out-loud-good.” —Harper’s Bazaar)
When Caroline Lash arrives in Greenhead, Massachusetts, she falls head-over-heels for Van Whittaker, a fleece-wearing, litter-collecting, kayak enthusiast with long, floppy hair and the personality of a Border collie. Born and raised in this picturesque coastal village, Van runs with the same crowd he did as a kid: His ex-girlfriend, Bailey, a beautiful girl who attracts men like moths to a flame; Augusta, old money, horsey, and snobbish; and Fran, surrounded by brothers and sons, too fed up with boys to ever consider marrying one.
Together, the group runs wild through the marshes, beaches, and bars of Greenhead, drinking on houseboats, spending long afternoons sunbathing with their children, and playing games the way they always have. But when Bailey discovers that she is pregnant with Van’s baby, the delicate balance of the group’s friendship is thrown off. Soon Caroline is cast out of the circle and what she does next—in a potent mix of fury and heartbreak—exposes long-held secrets and works the entire town of Greenhead into a lather. Dazzlingly funny, sexy, and as juicy as it is astute, The Shampoo Effect is a story of late-night parties, early mornings with small children, the dawn of midlife, and a group of old friends finally growing up despite all their best efforts to the contrary.“Jackson rotates the point of view around the set of friends, deftly depicting the practices and pressures of modern parents . . . This easy read combines a literary rom-com with an acute portrait of midlife among millennials.” —Kirkus
https://bookshop.org/a/123058/9798217059959
Jackson (Pineapple Street) offers sharp social commentary on millennials navigating middle age, set in a close-knit Massachusetts beach town. Caroline, an outsider, narrates much of the story, with other voices offering their perspectives. The daughter of a bestselling author, Caroline is determined to forge her own literary identity. After publishing a story in The New Yorker, she quits her publishing job and wins a prestigious writing fellowship that comes with a stay in a seaside cottage once owned by a legendary local writer. There she meets Van, a passionate environmentalist, and is drawn into his longtime circle of friends. As she immerses herself in their world—and falls in love with Van—initially guarded relationships soften. But everything shifts when one of Van’s friends reveals she is pregnant with his child. Though Caroline and Van navigate the pregnancy, things change after the baby’s birth, and Caroline lashes out the only way she knows how: through her writing. Her thinly veiled short story, based on Van’s friends, detonates this small town. Hidden truths surface, relationships fracture, and everyone is forced to reckon with what they’ve been avoiding.
VERDICT Fueled by humor, sex, and drugs, this pointed, character-driven novel should appeal to fans of Emma Straub or Taffy Brodesser-Akner.
©Library Journal, 2026
6/2026 Stacy Alesi, AKA the BookBitch
THE SHAMPOO EFFECT by Jenny Jackson. Pamela Dorman Books. (June 30, 2026). ISBN: 979-8217059959. 352p.

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