All the Summers In Between

All the Summers In Between by Brooke Lea Foster is a novel published by Simon and Schuster on May 13, 2025. This 336-page book is written in English and explores the intricate dynamics of friendship through the lens of two estranged friends, Margot and Thea, who reconnect in the Hamptons after a decade apart. Their unexpected reunion forces them to confront a traumatic event from their past that drove them apart, revealing the complexities of their relationship and the secrets they harbor.
Readers will find a narrative that unfolds across two timelines, 1967 and 1977, as it delves into themes of friendship, trust, and personal growth. The story captures the essence of a transformative era while providing a glimpse into the vibrant life of the Hamptons. As Thea navigates her unfulfilled life as a housewife, she grapples with the allure of adventure that Margot brings, all while questioning whether some friendships are meant to endure or remain in the past. This edition offers a rich exploration of women’s experiences and the bonds that shape their lives.
Official synopsis Publisher
“Make room in your beach bag for this mesmerizing book” (Patti Callahan Henry, New York Times bestselling author) about two estranged friends whose unexpected reconnection in the Hamptons forces them to finally confront the terrible event that drove them apart.
When wealthy, impulsive Margot meets hardworking and steady Thea in the summer of 1967, the unlikely pair become fast friends, working alongside one another in a record store and spending every spare moment together. But after an unspeakable incident on one devastating August night, they don’t see one another for ten years…until Margot suddenly reappears in Thea’s life, begging for help and harboring more than one dangerous secret. Thea can’t bring herself to refuse her beloved friend—but she also knows she can’t fully trust her either.
Unfulfilled as a housewife, Thea enjoys the dazzling sense of adventure Margot brings to her life, but will the truth of what happened to them that fateful summer ruin everything? Testing the boundaries of how far she’ll go for a friend, Thea is forced to reckon with her uncertain future while trying to decide if some friends are meant to remain in the past.
Set in the dual timelines of 1967 and 1977, All the Summers In Between is at once “a taut, dynamic examination” (Lynda Cohen Loigman, author of The Wartime Sisters) of a complex friendship, a delicious glimpse into a bygone Hamptons, and a powerful coming-of-age story of two young women during a transformative era.
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