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The Shampoo Effect

Jenny Jackson

$55

Hardback

Forthcoming
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English
Hutchinson Heinemann
02 August 2026
An accidental pregnancy turns a tight-knit group on its head in this witty and irresistible novel of modern love, sex, and friendship, from the New York Times bestselling author of PINEAPPLE STREET ('Blissfully enjoyable' India Knight).

'I devoured THE SHAMPOO EFFECT . . . it's funny, drama-fuelled, and full of Jackson's breezy wit, but what stayed with me most was how honestly and insightfully it captures the grit beneath the gloss of these characters.' Coco Mellors, Sunday Times bestselling author of BLUE SISTERS

When writer Caroline Lash arrives in Greenhead, she falls immediately for its scenic beaches and New England charm - and even harder for Van Whittaker, a gorgeous, fleece-wearing, litter-collecting, kayak enthusiast.

She meets his friends- Augusta, old money and uptight; Fran, drowning in everyone else's problems whilst keeping two kids (and an inebriated husband) afloat; and Bailey, who is sexy, confident... and inconveniently pregnant with Van's child.

Determined nothing will dull the shine of her new romance, Caroline joins the friends as they run wild through Greenhead, drinking on houseboats, gossiping on beaches while their children paddle, and playing risky games.

It seems the fun will last forever - until it doesn't. As decades-old friendships and marriages begin to fracture, Caroline's place in their world is called into question. And with all the group's most tightly held secrets at stake, who knows what might come out?

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, and old friends finally growing up - despite all their best efforts.
By:  
Imprint:   Hutchinson Heinemann
Country of Publication:   United Kingdom
Dimensions:   Height: 222mm,  Width: 138mm,  Spine: 40mm
Weight:   500g
ISBN:   9781529155228
ISBN 10:   1529155223
Pages:   352
Publication Date:  
Audience:   General/trade ,  ELT Advanced
Format:   Hardback
Publisher's Status:   Forthcoming

Jenny Jackson is a Vice President and Executive Editor at Alfred A. Knopf. A graduate of Williams College and the Columbia Publishing Course, Jenny lives in Brooklyn Heights with her family. Pineapple Street is her first novel.

Reviews for The Shampoo Effect

I devoured The Shampoo Effect. Jackson has a rare knack for capturing the intensity of old friendships and the way love, jealousy, money, and history combust until everyone is behaving (deliciously) badly. It's funny, drama-fueled, and full of Jackson's breezy wit, but what stayed with me most was how honestly and insightfully it captures the grit beneath the gloss of these characters. A brilliant story of marriage, motherhood, and the difficult work of breaking old patterns to become someone new -- Coco Mellors, New York Times bestselling author of BLUE SISTERS An absolute DELIGHT. This book has everything I love in a beach read: a coastal setting, multiple points of view, compelling storylines, and a delicious specificity to the writing that makes every single sentence feel fresh and alive. Jenny Jackson’s The Shampoo Effect is a must, must, must for your summer reading list. -- Elin Hilderbrand, #1 New York Times bestselling author of SWAN SONG Funny, sharp, and charming -- Rebecca Serle, New York Times bestselling author of ONE ITALIAN SUMMER The Shampoo Effect is a delicious, unputdownable portrait of a group of friends navigating love, marriage, and young parenthood. Jackson's characters are fully drawn, complex and flawed, each traveling a true arc of growth, arriving in the final pages at a deeper understanding of the ties that bind them to one another. I loved it -- Belle Burden, #1 New York Times bestselling author of STRANGERS


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