The Hidden Key of Brooke Sumner - by Susan L Tuttle (Paperback)

Book Synopsis

In the third installment of the Treasures of Halstead Manor series, Brooke Sumner carefully avoids and ignores Storm Whitlock--her replacement in Caspar's mysterious treasure-hunting group--and instead focuses on her antique shop.

Caspar's next assignment entails finding the second half of a key lodged in the spine of their most recent discovery, and Brooke reluctantly rejoins the group to keep Storm in check. But as they delve into their next adventure, she realizes that Storm might not be who she thought. While the mysterious key unlocks a vault of secrets, Brooke discovers that treasure-hunting together has unlocked her heart toward Storm and the rest of the group. With priceless artifacts at their fingertips, the team discovers that the true treasure is so much more.

The Hidden Key of Brooke Sumner combines mystery, friendship, and romance, sending the reader on an action-packed adventure around the globe in pursuit of a treasure that could fall into the wrong hands. Susan L. Tuttle spins a story with relatable characters and an engaging mystery that will keep readers turning pages late into the night.

Review Quotes

The Hidden Key of Brooke Sumner answers the question we've all asked at one time or another: Where do I belong? 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. This modern-day romance is filled with heart and the love of Jesus. Fans of Becky Wade and Melissa Tagg will be enthralled with this story.--Toni Shiloh, Christy Award-winning author (10/27/2025 12:00:00 AM)

The Hidden Key of Brooke Sumner is a captivating journey brimming with heart-pounding treasure hunts and slow-burn romance. Susan L. Tuttle invites readers to chase clues across the globe while falling in love with Brooke and Storm's unforgettable chemistry. Every clue, every twist points to a greater message: True riches are found in Christ alone.--Jessica R. Patch, New York Times best-selling author (10/27/2025 12:00:00 AM)

The Hidden Key of Brooke Sumner is a priceless treasure for readers to uncover. The race to find clues and evade danger is masterfully interwoven with heart-twisting revelations and a desperate hope that all will work out in the end. From the second-chance romance with a don't-touch-her hero to the beautiful settings all over Europe, this is one adventure you don't want to miss.--Crystal Caudill, award-winning author of Sung in the Shadows (10/27/2025 12:00:00 AM)

The Hidden Key of Brooke Sumner is a thrilling adventure of faith, romance, and adventure with plenty of suspense to keep you at the edge of your seat. Storm and Brooke's book weaves a beautiful story of a secretly desired romance between lifelong friends who overcome obstacles in their journeys of love, healing, and forgiveness.--Tawni Suchy, author of The Inn Dilemma (10/27/2025 12:00:00 AM)

In The Hidden Key of Brooke Sumner, readers will be transported on a treasure hunt that takes them around the globe. Add in shadows from the past, layers of romance, and the threats of suspense, and I couldn't read this novel fast enough. This is a wonderful conclusion to a series that I have inhaled, from an author who is a new addition to my must-read list.--Cara Putman, award-winning author of the Secrets to Keep series (10/27/2025 12:00:00 AM)

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 (10/27/2025 12:00:00 AM)

Susan Tuttle delivers a story brimming with heart, mystery, and faith. With a cast of unforgettable characters and just the right touch of adventure, this book reminds readers that hope often shows up in the most unexpected places.--Natalie Walters, award-winning and best-selling author of the SNAP Agency series (10/27/2025 12:00:00 AM)

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 (10/27/2025 12:00:00 AM)

Susan Tuttle's latest takes readers on a romantic adventure seeking lost art, but the real prize is the pearls of truth tucked in the pages for any heart seeking shelter from life's storms. I highlighted entire passages and enjoyed the journey to healing and love. With relatable characters, European settings, and the best kind of plot twists, The Hidden Key of Brooke Sumner is a treasure for lovers of heartfelt Christian romance.--Emily Conrad, author of the Rhythms of Redemption Romances (10/27/2025 12:00:00 AM)

Who needs a passport when The Hidden Key of Brooke Sumner sweeps you away on a thrilling global adventure? As clues unfold and villains close in, Tuttle delivers a page-turning journey where mystery meets heart and true love is the ultimate discovery. This engaging romantic mystery will have you racing to the end while cheering for a love that defies all odds and embraces the beauty of second chances.--Rachel Scott McDaniel, award-winning author of The Dreams We Knew (10/27/2025 12:00:00 AM)