It's 1938 and Europe teeters on the edge of war.
In Berlin, life for Mila Nessian - genius mathematician, billionaire and womaniser - is one long party. A spot of rocket science by day, the Third Reich's prettiest daughters by night. She knows what they whisper behind their hands - that Germany's most dazzling mind has nothing but a calculator where her heart should be, a sliver of ice instead of soul. She smirks through yet another boring cocktail party and hopes they're wrong.
Because what Mila is working on could steer the course of the coming war. The Nazis want her brilliance, British Secret Intelligence wants her silence, and Cecelia - once she has laughed with her, slept with her, sipped champagne on a Zeppelin with her and lost her heart to her - Cecelia wants her love.
Can she win Mila's trust and save her from the powers that control both their lives? .Once in Berlin is a sapphic historical romance.