Novels like The Unexpected Engagement of the Marvelous Mr. Penn

All share Historical and Romance Subplot

Antithesis: Love and Blood

Chronicles of the Savior: Ghost of Vengeance (Anti-Hero OP MC, Kingdom Building, Epic Fantasy)

The Hollow Continent

Convergence: Case To The Reality's Edge

Ansh - One who Seeks

Reborn 1965: Unraveling Silent Secrets

Scions of the Otherworld

Accidental War Mage

The Soulstealer's War

Retribution Engine