The Warsaw Cipher

Poland, 1942. A sealed letter arrives from Paris. Inside is a love confession - and a cipher that could destroy everything.Marta Kowalski has survived two years as a nurse and resistance courier in a Nazi work camp outside Warsaw by following three rules: stay consistent, know only what you must, and never let anything show. She has kept to these rules without exception.Then a letter arrives through the resistance network, addressed to her by first name only, in a handwriting she recognised before she finished opening the envelope. It belongs to Miriam - a woman she loved in Vienna in 1929, a woman she believed was dead, a woman she has mourned without a body or a confirmation for eleven years.The first page is a love letter. The second is a cipher they built together as a game in 1930, now carrying the most dangerous intelligence Marta has ever received: the name of a Gestapo officer operating inside her own camp under Wehrmacht cover, and a list of twelve resistance members he has already betrayed.Decoding the cipher is the easy part. What follows - the investigation, the informant, the records room, the decisions made against orders - will test every rule Marta has built her survival on.The Warsaw Cipher is the second novel in The Unbroken Thread, a sweeping four-part series following women across occupied Europe, each holding one piece of a story that will not be complete until a generation later. It is a novel about the cost of knowing, the weight of trust, and the extraordinary courage of a woman who does the right thing in conditions designed to make the right thing impossible.For readers of Kristin Hannah, Kate Quinn, and Heather Morris.Also in The Unbroken Thread series:Book One: The Paris SilenceBook Three: The Amsterdam Promise - Coming SoonBook Four: The Last Letter Home - Coming Soon