Start with high-confidence epistolary fiction books, then narrow by subgenre or adjacent topics.
The Ides of March
Thornton Wilder
Upstate
Chadwick Boseman, Heather Simms
Letters From Skye
Jessica Brockmole, Elle Newlands
Nothing But the Rain
Naomi Salman
The Berlin Letters
Katherine Reay
A Town With Half the Lights on
Page Getz
This Is How You Lose the Time War
Amal El-Mohtar, Max Gladstone
The Letter
Kathryn Hughes
