The Banned Books of Berlin by Daisy Wood

Another unforgettable story, tying together past and present, from the bestselling author of The Forgotten Bookshop in Paris and The Royal Librarian
Berlin, 1933. The night skies are burning bright with huge bonfires of banned books. The Nazi party is swelling in number and Berlin is no longer a safe place for young Freya.
She can only watch on, horrified, as her beloved city falls to fascism – and the usually law-abiding Freya is forced to make a choice: continue being a bystander, or sacrifice herself to save the lives of others…
New York, present day. Maddie commutes home to her family to reset. Struggling to fully turn off from her work, she is surprised to come across a pre-war German diary amongst her Grandpa’s things. And when she starts to dig into the diary, Maddie’s shocked by what she finds.
And so begins a journey that will take Maddie beyond America