Start with high-confidence post–world war ii fiction books, then narrow by subgenre or adjacent topics.
The Night Portrait
Laura Morelli
The Stolen Lady
The Art Spy
Michelle Young
Last Twilight in Paris
Pam Jenoff
The London House
Katherine Reay
Horse Under Water
Len Deighton
Spy Story
Twinkle, Twinkle, Little Spy
The Wall
Marlen Haushofer, Shaun Whiteside
The Berlin Letters
Churchill's Secret Messenger
Alan Hlad
Code Name: Lise
Larry Loftis
In True Face
Jonna Mendez, Jonna Méndez
Spymistress
William Stevenson
Escape From Paris
Carolyn G. Hart
