Love the intrigue of Under Occupation by Alan Furst? Try these!

Beneath a Scarlet Sky by Mark Sullivan
In 1940s Italy, teenager Pino Lella joins an underground railroad helping Jews escape over the Alps and falls for a beautiful widow. He also becomes the personal driver of one of the Third Reich’s most powerful commanders.

An Officer and a Spy by Robert Harris
Bringing to life the scandal that mesmerized the world at the turn of the twentieth century, the author tells a tale of uncanny timeliness, a witch hunt, secret tribunals, out-of-control intelligence agencies, and the fate of a whistle-blower.

City of Thieves by David Benioff
Documenting his grandparents’ experiences during the siege of Leningrad, a young writer learns his grandfather’s story about how a military deserter and he tried to secure pardons by gathering hard-to-find ingredients for a powerful colonel’s daughter’s wedding cake.