Tess Gerritsen: The Shadow Friends (UK 2027)

From the publisher:
THE MARTINI CLUB IS NOT YOUR USUAL BOOK GROUP. THEY ALSO LOVE BIRD WATCHING.
THEY ARE ALSO RETIRED SPIES... SO THINGS CAN GET PRETTY EXCITING.
And now, driven from their peaceful home town to save a friend, Maggie Bird and her friends must rely on each other more than ever...

A murder at a global conference in Purity brings back an old flame for retired spy Ingrid - a fellow CIA agent she worked with decades ago in an operation that ended in the deaths of three people, including the young woman they were supposed to protect. Has the killer resurfaced after all these years? Now Ingrid faces a difficult join her ex-lover in pursuit of the assassin or forsake the vow she made years ago to avenge the dead.

But when Ingrid abruptly vanishes, her husband Lloyd must spring to action. Lloyd, an ex-CIA analyst, has no experience in the field, but he does have the skills to find his wife. With a concerned Maggie in tow, he tracks Ingrid to Amsterdam, where he unwittingly sets off a chain of events that threaten Ingrid's life, and could lead to the end of the Martini Club.

Meanwhile in Maine, detective Jo Thibodeau - helped by the remaining members of the club, uncovers startling evidence that turns all their assumptions upside down about who the murderer really is.

Tess Gerritsen: The Shadow Friends. Can they trust each other? Bantam Press, ISBN: 9780857508508 (January, 2027), 368 p., £20.00, eBook £10.99.

Tess Gerritsen: The Shadow Friends (USA 2026)

From the publisher:
THE MARTINI CLUB IS NOT YOUR USUAL BOOK GROUP. THEY ALSO LOVE BIRD WATCHING.
THEY ARE ALSO RETIRED SPIES... SO THINGS CAN GET PRETTY EXCITING.
And now, driven from their peaceful home town to save a friend, Maggie Bird and her friends must rely on each other more than ever...

A murder at a global conference in Purity brings back an old flame for retired spy Ingrid - a fellow CIA agent she worked with decades ago in an operation that ended in the deaths of three people, including the young woman they were supposed to protect. Has the killer resurfaced after all these years? Now Ingrid faces a difficult join her ex-lover in pursuit of the assassin or forsake the vow she made years ago to avenge the dead.

But when Ingrid abruptly vanishes, her husband Lloyd must spring to action. Lloyd, an ex-CIA analyst, has no experience in the field, but he does have the skills to find his wife. With a concerned Maggie in tow, he tracks Ingrid to Amsterdam, where he unwittingly sets off a chain of events that threaten Ingrid's life, and could lead to the end of the Martini Club.

Meanwhile in Maine, detective Jo Thibodeau - helped by the remaining members of the club, uncovers startling evidence that turns all their assumptions upside down about who the murderer really is.

Tess Gerritsen: The Shadow Friends. A Thriller. Thomas & Mercer, ISBN: 9781662533419 (August, 2026), 368 p., Hardcover $28.99, Paperback $16.99, eBook $3.99.