In 1944, American naval officer Lt. Wyatt Paxton arrives in London to prepare for the Allied invasion of France. He works closely with Dorothy Fairfax, a "Wren" in the Women's Royal Naval Service. Dorothy pieces together reconnaissance photographs with thousands of holiday snapshots of France - including those of her own family's summer home - in order to create accurate maps of Normandy. Maps that Wyatt will turn into naval bombardment plans. As the two spend concentrated time together in the pressure cooker of war, their deepening friendship threatens to turn to love.

As the Nazis march toward Paris in 1940, American ballerina Lucie Girard buys her favorite English-language bookstore to allow the Jewish owners to escape. Lucie struggles to run Green Leaf Books due to oppressive German laws and harsh conditions, but she finds a way to aid the resistance by passing secret messages between the pages of her books.

Lt. Mellie Blake is looking forward to beginning her training as a flight nurse. She is not looking forward to writing a letter to a man she’s never met - even if it is anonymous and part of a morale-building program. Lt. Tom MacGilliver, an officer stationed in North Africa, welcomes the idea of an anonymous correspondence - he’s been trying to escape his infamous name for years. As their letters crisscross the Atlantic, Tom and Mellie develop a unique friendship despite not knowing the other’s true identity. When both are transferred to Algeria, the two are poised to meet face-to-face for the first time.

In 1942, Evie Farrow is used to life on Ocracoke Island, where every day is the same—until the German U-boats haunting their waters begin to wreak havoc. And when special agent Sterling Bertrand is washed ashore at Evie's inn, her life is turned upside down. While Sterling's injuries keep him inn-bound for weeks, making him even more anxious about the man he's tracking, he becomes increasingly intrigued by Evie, who seems to be hiding secrets of her own.

Three years into the Great War, England's greatest asset is their intelligence network - field agents risking their lives to gather information, and codebreakers able to crack every German telegram. Margot De Wilde thrives in the environment of the secretive Room 40, where she spends her days deciphering intercepted messages. But when her world is turned upside down by an unexpected loss, for the first time in her life numbers aren't enough.

Left with an estate on the brink of bankruptcy after their father's death, Lady Marigold Fairfax and her brother open a private investigation firm marketed to the elite . . . to spy on the elite. Dubbed The Imposters, Ltd., their anonymous group soon becomes the go-to for the crème of society when they want answers delivered surreptitiously. But the many secrets Marigold learns about her peers pale in comparison to her shock when she and her brother are hired to investigate her best friend's father as a potential traitor.

Brook Eden has never known where she truly belongs. Though raised in the palace of Monaco, she's British by birth and was brought to the Grimaldis under suspicious circumstances as a babe. When Brook's friend, Justin, uncovers the fact that Brook is likely a missing heiress from Yorkshire, Brook leaves the sun of the Mediterranean to travel to the moors of the North Sea, to the estate of her supposed family.

Peter Holstein writes his popular series of adventure novels under a pen name. With European politics boiling and his own neighbors suspicious of him, Peter debates whether it might be best to change his name for good. When Rosemary shows up at his door pretending to be a historian and offering to help him trace his family history, his question might be answered. But as the two work together and Rosemary sees his gracious reaction to his neighbors' scornful attacks, she wonders if her assignment is going down the wrong path.

Peggy Serrano couldn’t wait for her best friend to come home from the war. But the Jimmy Barnett who returns is much different from the Jimmy who left, changed so drastically by his experience as a medic in Europe that he can barely function. When he attempts the unthinkable, his parents check him into the VA hospital. Peggy determines to help the Barnetts unravel what might have happened to send their son over the edge. She starts by contacting Jimmy’s war buddies, trying to identify the mysterious woman in the photo they find in Jimmy’s belongings.

1941, Poland. Though war rages around her and occupying German forces march steadily onward, 16-year-old Aleksandra has lived her life sheltered from danger. Until one day, she goes to school—never to return. Pushed roughly into a truck with other schoolgirls like her, a single ominous word tells her all she needs to know about her fate: Lebensborn.

In this gripping WWII time-slip novel from the author whose books have been called “propulsive” and a “must-read” (Publishers Weekly), Grace Tonquin is an American Quaker who works tirelessly in Vichy France to rescue Jewish children from the Nazis. After crossing the treacherous Pyrénées, Grace returns home to Oregon with a brother and sister whose parents were lost during the war. Though Grace and her husband love Élias and Marguerite as their own, echoes of Grace’s past and trauma from the Holocaust tear the Tonquin family apart.

1950. In the wake of the war, Audrey Clarkson leaves her manor house in England for a fresh start in America with her young son. As a widowed war bride, Audrey needs the support of her American in-laws, whom she has never met. But she arrives to find that her longtime friend Eve Dawson has been impersonating her for the past four years. Unraveling this deception will force Audrey and Eve’s secrets - and the complicated history of their friendship - to the surface.

As a former smokejumper, arson investigator Bri Tucker knows her way around fires. But after a mysterious blaze takes the life of a former colleague, Bri inherits a curious puzzle from him that raises questions about several fiery deaths. Someone, however, doesn’t want her picking up where he left off in search of answers. When she teams up with ATF Special Agent Marc Davis to solve the puzzle, the case heats up—as does the attraction between them.

Ex-FBI profiler River Ryland still suffers from PTSD after a case went horribly wrong. Needing a fresh start, she moves to St. Louis to be near her ailing mother and opens a private investigation firm with her friend and former FBI partner, Tony St. Clair. They're soon approached by a grieving mother who wants them to find out what happened to her teenaged son, who disappeared four years ago. River knows there's almost no hope the boy is still alive, but his mother needs closure, and River and Tony need a case, no matter how cold it might be.

It is 1936, and Nancy Wake is an intrepid Australian expat living in Paris who has bluffed her way into a reporting job for Hearst newspaper when she meets the wealthy French industrialist Henri Fiocca. No sooner does Henri sweep Nancy off her feet and convince her to become Mrs. Fiocca than the Germans invade France and she takes yet another name: a code name. As Lucienne Carlier, Nancy smuggles people and documents across the border and earns a new nickname from the Gestapo for her remarkable ability to evade capture: The White Mouse.

It is 1941, and America teeters on the brink of war. Outgoing naval officer Ensign Jim Avery escorts British convoys across the North Atlantic in a brand-new destroyer, the USS Atwood. Back on shore, Boston Navy Yard secretary Mary Stirling does her work quietly and efficiently, happy to be out of the limelight.

As the Nazis march toward Paris in 1940, American ballerina Lucie Girard buys her favorite English-language bookstore to allow the Jewish owners to escape. Lucie struggles to run Green Leaf Books due to oppressive German laws and harsh conditions, but she finds a way to aid the resistance by passing secret messages between the pages of her books.

Never pretty enough to please her gorgeous mother, Allie will do anything to gain her approval - even marry a man she doesn't love. Lt. Walter Novak - fearless in the cockpit but hopeless with women - takes his last furlough at home in California before being shipped overseas. Walt and Allie meet at a wedding and their love of music draws them together, prompting them to begin a correspondence that will change their lives. As letters fly between Walt's muddy bomber base in England and Allie's mansion in an orange grove, their friendship binds them together.

When German bombs set London ablaze, BBC radio correspondent Hugh Collingwood reports on the Blitz, eager to boost morale while walking the fine line between truth and censorship. But the Germans are not the only ones Londoners have to fear as a series of murders flame up amid the ashes. The deaths hit close to home for Hugh, and Aleida needs his help to locate her missing son. As they work together, they grow closer and closer, both to each other and the answers they seek. But with bombs falling and continued killings, they may be running out of time.

When the Germans march into Denmark, Baron Henrik Ahlefeldt exchanges his nobility for anonymity, assuming a new identity so he can secretly row messages for the Danish Resistance across the waters to Sweden. American physicist Dr. Else Jensen refuses to leave Copenhagen and abandon her research-her life's dream. While printing resistance newspapers, she hears stories of the movement's legendary Havmand-the merman-and wonders if the mysterious and silent shipyard worker living in the same boardinghouse has something to hide.