The Shampoo Effect

New out June 30, 2026

The Shampoo Effect

Jenny Jackson

First published 2026

8.18.1 / 10
Score out of 1026 ratingsEarly score · confidence 15%
  • NYT bestseller · 3 weeks on the list, peaked at #9

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About the book

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.

Description: publisher’s blurb via Hardcover

Where the score comes from

The sources average 7.7 across 26 ratings — not yet many, so the reader vote carries 15% of the weight and the rest pulls toward the Rankings average of 7.8. That is how 8.1 comes out.

SourceAverageRatingsWeight
Hardcover7.726 100%

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You will also find this book on the New books page, with the other titles of the last twelve months.