The Shampoo Effect

An accidental pregnancy upends a close-knit group in this witty and irresistible summer novel from New York Times bestselling author Jenny Jackson. Perfect for fans of Curtis Sittenfeld, Alison Espach, and Catherine Newman.

THE NEW YORK TIMES BESTSELLER
A READ WITH JENNA BOOK CLUB PICK
A VOGUE 'BEST BOOK OF 2026'

‘Funny, drama-fuelled, and full of Jackson's breezy wit…Brilliant’
COCO MELLORS, Sunday Times bestselling author of BLUE SISTERS

'The platonic ideal of a beach read: fun and fast-paced'
New York Times

'An absolute DELIGHT . . . a must, must, must for your summer reading list'
ELIN HILDERBRAND, New York Times bestselling author of THE FIVE STAR WEEKEND

OVER ONE LONG SUMMER, WHO KNOWS WHAT MIGHT COME OUT IN THE WASH?

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.

Specifications:

• Author: Jenny Jackson
• Binding: Hardcover
• Language: English
• Publication Date: July 2, 2026
• Publisher: Hutchinson Heinemann
• Print Length: 352 pages
• Dimensions: 14.7 x 3.2 x 22.6 cm
• Item Weight: 450 g
• ISBN-10: 1529155223
• ISBN-13: 978-1529155228

This contemporary fiction novel offers a compelling narrative of relationships, secrets, and personal growth, making it an engaging read for literary fiction enthusiasts.