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book cover for The Hidden Key of Brooke Sumner

The Hidden Key of Brooke Sumner

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Book 3 of Treasures of Halstead Manor

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Pub Date Mar 24 2026 | Archive Date Mar 26 2026


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Description

Will the key unlock more than a vault filled with treasure?

Brooke Sumner has been carefully avoiding Storm Whitlock ever since he betrayed her trust. When he joins Caspar's mysterious treasure-hunting group, she steps away to focus on her antique shop and keep herself busy.

When Caspar invites her back for one final assignment, Brooke is torn. Returning to Halstead Manor to help the team find the second half of a key is intriguing. It also means she'd be working with Storm. But she doesn't trust his motives, so she reluctantly rejoins to keep him in check.

As they dive into their expedition, Brooke finds her heart softening toward those she'd once held at arm's length. And is it possible she misunderstood Storm's betrayal of their friendship?

"In this friends-to-more romance, we get to see the beauty of being known, being loved, and finding the people who want to walk alongside us."

—Toni Shiloh, Christy Award-winning author

Will the key unlock more than a vault filled with treasure?

Brooke Sumner has been carefully avoiding Storm Whitlock ever since he betrayed her trust. When he joins Caspar's mysterious...


Advance Praise

"Oh my goodness, Susan Tuttle’s books just keep getting better! I was hooked with the first book in the Treasures of Halstead Manor, completely invested with the second, and hanging on every word with this third one. What a perfect conclusion to the series!" -- Charity Henico, line editor, proofreader, and audiobook narrator

"Susan Tuttle delivers an incredible finale with The Hidden Key of Brooke Sumner. Brooke’s journey to healing will capture your heart, and the chemistry between her and Storm is irresistible. Love, loss, and secrets collide in a story full of surprises, adventure, and tender moments. This book is storytelling magic at its finest." -- Joanna Davidson Politano, award-winning author of The Curious Inheritance of Blakely House

"Oh my goodness, Susan Tuttle’s books just keep getting better! I was hooked with the first book in the Treasures of Halstead Manor, completely invested with the second, and hanging on every word...


Available Editions

EDITION Paperback
ISBN 9780825448614
PRICE $17.99 (USD)
PAGES 272

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