The Seaside Murders
A pretty seaside town, a body on the beach, and a boatload of clues. Can super-sleuth Miss Jane Treen solve the mystery?
England, 1941: When Jane Treen is summoned to her boss’s office at the end of a long day, she smooths down her tweed skirt and makes them both another strong pot of coffee. Brigadier Remmington-Blythe slides a folded copy of the evening newspaper towards her, with one small article circled in red ink. A body has been found on an English beach in the little seaside town where she grew up, and he wants her to investigate.
Jane is used to managing secret agents and spies, but she is now part of The Secret Detective Agency, England’s answer to solving the most mysterious murders. Making her way to the coast and brimming with curiosity, she’s heartened that shy and handsome codebreaking genius Arthur Cilento will be joining her to help her wade through the fishy goings-on. Although Jane doubts he will appreciate her bringing her beloved one-eyed cat, Marmaduke…
Together, Jane and Arthur drop anchor in her crumbling childhood home overlooking the sandy beach where the body was found. Surrounded by potential suspects, their eyes are on a devious doctor, an eccentric artist and a secret sweetheart. But as Jane and Arthur are searching for the truth, those giving evidence start to clam up. One thing seems sure: they need to reel in the killer before they’re out of their depth…
Can The Secret Detective Agency triumph again, or will they meet their watery end at high tide?
Helena Dixon
Helena Dixon’s writing is a delicate dance of suspense, wit, and historical intrigue. With an eye for detail and a love for the past, Dixon has crafted a unique space in the world of cozy mysteries, where readers are not only swept up in intriguing whodunits but also immersed in richly drawn worlds that feel as alive as the characters that populate them.
Born and raised in the heart of England, Dixon’s childhood was steeped in the kind of history that so often finds its way into her work. From the cobblestone streets of charming villages to the whispers of past secrets, it’s clear that the stories of the past have always been a part of her. Her love for writing began early, and it wasn’t long before she started spinning tales that captured the intrigue of the British countryside, mixing suspense with a sharp eye for detail.
The Secret Detective Agency
Step into a world where secrets lurk in every shadow, and every clue leads to deeper mysteries. The Secret Detective Agency series, set in the 1940s, introduces readers to an unlikely but dynamic duo—Jane Treen, a government operative with a sharp mind and a quiet strength, and Arthur Cilento, a reserved but brilliant code-breaker. Together, they form a pair whose contrasting skills make them an unstoppable force in the world of clandestine investigations.
The Secret Detective Agency consists of four books and series is set to expand with the upcoming release of one more book. The current recommended reading order for the series is provided below.

