At the height of World War II, the British Air Transport Auxiliary need help. A group of young women volunteer for action, but the perils of their new job don’t end on the tarmac. Things are tough in the air, but on the ground their abilities as pilots are constantly questioned. There is friction from the start between the new recruits. Spirited American Lizzie turns heads with her audacity, but few can deny her flying skills. She couldn’t be more different from shy, petite Ruby, who is far from diminutive in the sky. It falls to pragmatic pilot May to bring the women together.

London, 1944. Two young nurses meet at a train station with a common purpose: to join the war effort. Scarlet longs for the chance to find her missing fiancé, Thomas, and to prove to her family - and to herself - that she's stronger than everybody thinks. Nursing is in Ellie's blood, but her humble background is vastly different from Scarlet's privileged upbringing. Though Ellie puts on a brave face, she's just as nervous as Scarlet about what awaits them in France.

Sicily, 1943. Three American women, all nurses in the Medical Air Evacuation Transport Squadron, are determined to do all they can for their country. Vita is fun-loving, Dot shy and sweet-natured, and Evelyn practical and determined, but for all their differences, a life of military service pulls the three together as firm friends. When they’re selected for a daring mission, the women are proud to play their part. But disaster strikes when their plane crash-lands behind enemy lines in occupied Albania. finally find their way home?

When Hazel is given the chance to parachute into Nazi-occupied France, she seizes the opportunity to do more for the British war effort than file paperwork. Alongside her childhood friend, French-born Rose, she quickly rises up the ranks of the freedom fighters. For Rose, the Resistance is a link to her late husband, and a way to move forward without him. What starts out as helping downed airmen becomes a bigger cause when they meet Sophia, a German escapee and fierce critic of Hitler who is wanted by the Gestapo.

Occupied France, 1940. When the staff at a field hospital draw straws to find out who will join the evacuation from Dunkirk, Nurse Cate is left behind. But when the Nazis arrive to claim prisoners of war, she takes her chance and flees into the night, taking one patient with her. Fifty miles away, the surrendering soldiers of the Royal Norfolk Regiment are shot dead by the advancing Germans. Beneath the pile of bodies two men survive, crawling to the safety of a nearby farmhouse, where sisters Elise and Adelaide risk their lives to take them in.

When journalist Ella Franks is unmasked as a woman writing under a male pseudonym, she loses her job. But having risked everything to write, she refuses to be silenced and leaps at the chance to become a correspondent in war-torn France. Already entrenched in the thoroughly male arena of war reporting is feisty American photojournalist Danni Bradford. Together with her best friend and partner, Andy, she is determined to cover the events unfolding in Normandy. And to discover the whereabouts of Andy’s sister, who has followed a lover into the French Resistance.

London, 1941. The Blitz. When a Royal Navy memo arrives at head office, requesting female recruits to sign up as motorcycle dispatch riders, delivering highly classified orders across the country, three women jump at the chance to sign up for the most dangerous jobs in London.

When Lily is called to a lawyer’s office in London, she has no idea that her life is about to change forever. There, she is told that her grandmother was born at Hope House, a home for unmarried mothers, and is given a box containing the only clues to her true heritage. Peeling back the delicate layers of paper she finds an Italian recipe and a theatre program.

Daisy Wilder prefers the company of horses to people, bare feet and salt water to high heels and society parties. Then, in the dizzying aftermath of the attack on Pearl Harbor, Daisy enlists in a top secret program, replacing male soldiers in a war zone for the first time. Under fear of imminent invasion, the WARDs guide pilots into blacked-out airstrips and track unidentified planes across Pacific skies. But not everyone thinks the women are up to the job, and the new recruits must rise above and work side by side despite the resistance and heartache they meet along the way.

Occupied Poland, 1942: Despite the constant presence of German soldiers in her village, Emilia is allowed certain freedoms as a midwife—the most precious is innocently cycling past Nazi checkpoints to the homes of expectant mothers on her rounds. But Emilia has a secret: for years she’s also been visiting the hidden Jewish mothers and working for the resistance…until she is betrayed.

1941. Audrey Coltrane has always wanted to fly. It's why she implored her father to teach her at the little airfield back home in Texas. It’s why she signed up to train military pilots in Hawaii when the war in Europe began. And it’s why she insists she is not interested in any dream-derailing romantic involvements, even with the disarming Lieutenant James Hart, who fast becomes a friend as treasured as the women with whom she flies. Then one fateful day, she gets caught in the air over Pearl Harbor just as the bombs begin to fall, and suddenly, nowhere feels safe.

Londoner Madeleine Grant is studying at the Sorbonne in Paris when she marries charismatic French journalist Giles Martin. As they raise their son, Olivier, they hold on to a tenuous promise for the future. Until the thunder of war sets off alarms in France. Staying behind to join the resistance, Giles sends Madeleine and Olivier to the relative safety of England, where Madeleine secures a job teaching French at a secondary school. Yet nowhere is safe. After a devastating twist of fate resulting in the loss of her son, Madeleine accepts a request from the ministry to aid in the war effort.

As war moves ever closer, the sleepy English village of Crowmarsh Priors settles into a new sort of normal: Evacuees from London are billeted in local homes. The nightly German air raids become grimly mundane. Rationing curtails every comfort. Men leave to fight and die. And five women forge a bond of friendship that will change their lives forever in this engrossing novel of loyalty, loss, and love in the shadow of World War II.With the hardships of war intensifying every day, the women band together to defeat formidable enemies and find remarkable strength within themselves to help one another. It is a war-forged loyalty certain to endure years and distance. When four of the women return for a celebration fifty years later, their mission is not simply to commemorate or remember. They’ve returned to confront a traitor whose actions cost countless lives — and to avenge one of their own at last.

November, 1941. She’s never even seen the ocean before, but Eva Cassidy has her reasons for making the crossing to Hawaii, and they run a lot deeper than escaping a harsh Michigan winter. Newly enlisted as an Army Corps nurse, Eva is stunned by the splendor she experiences aboard the steamship SS Lurline; even more so by Lt. Clark Spencer, a man she is drawn to but who clearly has secrets of his own. But Eva’s past - and the future she’s trying to create - means that she’s not free to follow her heart.

Marie-Laure lives with her father in Paris near the Museum of Natural History, where he works as the master of its thousands of locks. When she is six, Marie-Laure goes blind and her father builds a perfect miniature of their neighborhood so she can memorize it by touch and navigate her way home. When she is 12, the Nazis occupy Paris and father and daughter flee to the walled citadel of Saint-Malo, where Marie-Laure’s reclusive great-uncle lives in a tall house by the sea. With them they carry what might be the museum’s most valuable and dangerous jewel.