The Earl of Devonsfield needs to find an heir, and fast. With his life coming to an end soon, he just can't allow his title to go back to the Crown. After putting his man of affairs to work, it's soon discovered he has twin nephews, Griffin and Garnet St. Albans. However, the first-born has never been determined. But the earl has a plan -- whichever of them marries first will inherit the title.

Griffin St. Albans loves astronomy. One day he'd love to have an appointment in the Royal Astronomical Society, but that's only a dream. While checking his settings on his telescope on the cliffs near his home, he discovers a lovely lady standing below on a ledge, trying to recapture her bonnet. After helping her to stable ground, she declares he's responsible for the bonnet being lost and gives him a card noting where to send her a new one.

Hannah Chillton plans to make her way in life as a matchmaker, training her falcon to help her with her deeds. However, her aunts, the Featherton ladies, don't believe one should charge for good deeds and they go about proving their point.

While on the way to Bath, Hannah and her aunts have a little accident with a stranger on the road. Thinking the man looks familiar, it takes a moment for Hannah to realize the arrogant man sitting across from her in the carriage is the man she thought was so nice before, Mr. St. Albans. Hannah's aunts waste no time trying to make a match and invite Mr. St. Albans to recover at their home in Bath.

When Griffin declares his intentions to his twin brother regarding Hannah, Garnet decides to help Griffin get the girl. One moment, Hannah likes Mr. St. Albans and the next moment she can't stand him. When she's sure she's finally fallen in love with the man, she sees him with another woman, which breaks her heart. Griffin wants to marry Hannah, but he's unable to tell her the truth of the situation due to an agreement made with his uncle and brother.

LOVE IS IN THE HEIR is very charming and quite romantic. The characters are a blast! I felt so bad for Griffin and Hannah when they wanted to be together and had such difficulty doing so. A really great story to read on a lazy day.