The Rose Code by Kate Quinn is a book about three female code breakers -- Osla, Mab and Beth -- at Bletchley Park during WWII. The women form a friendship (and a book club) over the years, but a betrayal and traitor among their colleagues lands one of them in locked up in an asylum in the years after the war. But through a letter carefully smuggled out, she's able to issue a cry for help from her confinement. In this exciting and enthralling tale, The Rose Code tells the story of their friendship, their work and their disappointments and triumphs.