Look to the Stars by Olivia Kelly

Leonato Blakeley, heir to the earldom of Pennyworth, has no intention of marrying any time soon. He’s not against marriage, unless the term is being paired with his name. His great-uncle, the matchmaking Duke of Danby, has arrived in town, and Leo needs A Plan.

American heiress Miriam Rosenbaum has crossed an ocean to study the stars with the best scientists in the field. Well, perhaps her mother thinks they’re in London to find husbands for the scandalous Madcap Rosenbaum sisters. But Miriam is determined not only to visit the Royal Observatory, but participate in their groundbreaking research.

Together, they might have a chance at accomplishing their goals. But when the Season is over, walling away from each other might be their greatest challenge yet.