The ton has rules for courtship. Lady Hester prefers to study birds.

Hester Montagu has never quite mastered society’s mating rituals.

She speaks her mind. She observes more than she flatters. And she refuses to pretend she wants a husband who values her dowry more than her mind.

So when she asks her parents to host a country house party designed to secure her a match, she approaches it like any good naturalist would:

As an experiment. Three eligible gentlemen. One hopeful attachment. Simple.

Until she discovers that the only man who truly unsettles her is the one she cannot have.

Flint Eavesgrave, Earl of Lambourn, is already engaged to a sensible woman — a match that promises stability, respectability, and absolutely no risk to his guarded heart.

Lady Hester is the opposite of sensible. She is curious. Unfiltered. Infuriatingly perceptive. And entirely wrong for him.

Resisting her would be wise. But when observation turns to fascination — and fascination to desire — Flint must decide whether safety is worth losing the only woman who has ever seen him clearly.