His Cousin's Betrothed: A Pride and Prejudice Variation
Iris Lim

Wealthy, handsome, and privileged, Fitzwilliam Darcy has never had reason to envy his cousin Richard as the latter serves the Crown both on and off the battlefield. But things change when Richard shows up to a family house party betrothed to a supposed heiress, with seemingly no intention to honor his vows.
Left impoverished by her father’s untimely death, Elizabeth Bennet and her sister Jane serve the Crown as informants to provide for their family. Their assignments prove successful, until their latest one has them tangled up with an earl’s winsome son and his even more handsome cousin. Then suddenly, they’re not just risking their safety and their reputations, but also their hearts.
A Pride and Prejudice spy variation.