Start with high-confidence sci fi romance books, then narrow by subgenre or adjacent topics.
Hench
Natalie Zina Walschots
Hammajang Luck
Makana Yamamoto
The Double
José Saramago, Margaret Costa
The Two Lies of Faven Sythe
Megan E. O'Keefe, Megan E. O'Keefe
Slow River
Nicola Griffith
Time and Again
Nora Roberts
Guardian
Angela Knight
Rejar
Dara Joy
Gibbon's Decline and Fall
Sheri S. Tepper
Somewhere in Time
Richard Matheson
Volatile Memory
Seth Haddon, Emily Gibbons Bouchard
Just One Damned Thing After Another
Jodi Taylor
This Is How You Lose the Time War
Amal El-Mohtar, Max Gladstone
Wild Seed
Octavia E. Butler
Here, There & Everywhere
Chris Roberson
The Creative Fire
Brenda Cooper, Yetta Gottesman
Keepers
Brenda Cooper
The Ministry of Time
Kaliane Bradley, George Weightman
