Start with high-confidence billionaire romance books, then narrow by subgenre or adjacent topics.
The Duke and I
Julia Quinn, Rosalyn Landor
The Duke Gets Desperate
Diana Quincy
How to Fake It in Society
Kj Charles
The Rule of Three
Sara Cate
The Kiss Thief
L.J. Shen
Restore Me
J.L. Seegars
Now You're Mine
Morgan Bridges
Once You're Mine
Twisted
Emily McIntire
The Stopover
T L Swan, Sebastian York
The Takeover
T L Swan
The Do-over
The Ruler
Penelope Sky
King of Wrath
Ana Huang
King of Envy
Ana Huang, Jason Clarke
King of Gluttony
The Heart You Kept
