Start with high-confidence thrillers books, then narrow by subgenre or adjacent topics.
Jerusalem's Hope
Brock Thoene, Bodie Thoene
The Lineup
John Allen Nelson, Justine Eyre
Foreign Influence
Brad Thor, Armand Schultz
The Thirty-nine Steps
John Buchan
The Sorbonne Affair
Mark Pryor
Exquisite Corpse
Poppy Z. Brite, Joshua Saxon
Fade Away
Harlan Coben
