All her life, Zofia has found comfort in two things during times of hardship: books and her best friend, Janina. But no one could have imagined the horrors of the Nazi occupation in Warsaw. As the bombs rain down and Hitler’s forces loot and destroy the city, Zofia finds that now books are also in need of saving. With the death count rising and persecution intensifying, Zofia jumps to action to save her friend and salvage whatever books she can from the wreckage, hiding them away, and even starting a clandestine book club.

August 1939: London is dismal under the weight of impending war with Germany as Hitler’s forces continue to sweep across Europe. Into this uncertain maelstrom steps Grace Bennett, young and ready for a fresh start in the bustling city streets she’s always dreamed of - and miles away from her troubled past in the countryside. With aspirations of working at a department store, Grace never imagined she’d wind up employed at Primrose Hill, an offbeat bookshop nestled in the heart of the city - after all, she’s never been much of a reader.

Paris, 1952 -- An ex-pat wife living in Paris signs up for a cookery class taught by an American chef with an indomitable wit and decidedly French airs—an instructor by name of Julia Child. Amongst classes of the L'Ecole des Trois Gourmandes, with pots and pans and prim Paris wives learning to sauté in the French way, Kat Fontaine learns much more than she bargained for. Still haunted by the years she spent serving in the American Office of Strategic Services (OSS) during WWII, Kat soon finds a simple cookery class unearths the tangle of gut-wrenching memories of war.

In Nottingham, England, widow Emma Taylor finds herself in desperate need of a job. She and her beloved daughter Olivia have always managed just fine on their own, but with the legal restrictions prohibiting widows with children from most employment opportunities, she’s left with only one option: persuading the manageress at Boots’ Booklover’s Library to take a chance on her with a job.

Ava thought her job as a librarian at the Library of Congress would mean a quiet, routine existence. But an unexpected offer from the US military has brought her to Lisbon with a new mission: posing as a librarian while working undercover as a spy gathering intelligence. Meanwhile, in occupied France, Elaine has begun an apprenticeship at a printing press run by members of the Resistance. It’s a job usually reserved for men, but in the war, those rules have been forgotten. Yet she knows that the Nazis are searching for the press and its printer in order to silence them.

Haven Ambrose, a trailblazing nautical archaeologist, has come to the sun-soaked village of Positano to investigate the mysterious shipwrecks along the Amalfi Coast. But Haven is hoping to find more than old artifacts beneath the azure waters; she is secretly on a quest to locate a trove of priceless gemstones her late father spotted on his final dive. Upon Haven’s arrival, strange maelstroms and misfortunes start plaguing the town. Is it nature or something more sinister at work?

In a sleepy German village, Allina Strauss’s life seems idyllic: she works at her uncle’s bookshop, makes strudel with her aunt, and spends weekends with her friends and fiancé. But it's 1939, Adolf Hitler is Chancellor, and Allina’s family hides a terrifying secret—her birth mother was Jewish, making her a Mischling. One fateful night after losing everyone she loves, Allina is forced into service as a nurse at a state-run baby factory called Hochland Home. There, she becomes both witness and participant to the horrors of Heinrich Himmler’s ruthless eugenics program.

Florence Grimes is a thirty-one-year-old party girl who always takes the easy way out. Single, broke and unfulfilled after the humiliating end to her girl band career, she has only one reason to get out of bed each day: her ten-year-old son Dylan. But then Alfie Risby, her son’s bully and the heir to a vast frozen food empire, mysteriously vanishes during a class trip, and Dylan becomes the prime suspect. Florence, for once, is faced with a task she can’t quit: She’s got to find Alfie and clear her son’s name, or risk losing Dylan forever.

Lina Meisel, a retired librarian in Florida, is reading the newspaper one morning when she freezes. Her eyes lock on a photograph of a book she hasn’t seen in 65 years - a book she recognizes as The Book of Lost Names. The accompanying article discusses the looting of libraries by the Nazis across Europe during World War II - an experience Lina remembers well - and the search to reunite people with the texts stolen from them so long ago. The book in the photograph is one of the most fascinating cases.

London, 1953. Louise is still adjusting to her postwar role as a housewife when she discovers a necklace in a box at a secondhand shop. The box is marked with the name of a department store in Paris, and she is certain she has seen the necklace before, when she worked with the Red Cross in Nazi-occupied Europe—and that it holds the key to the mysterious death of her friend Franny during the war. Following the trail of clues to Paris, Louise seeks help from her former boss Ian, with whom she shares a romantic history.