Earl for the Summer by Christy Carlyle

A tangled deception, an undeniable desire—how long before the truth breaks them apart?

Scarred by war, in both body and mind, Cassian Rourke lives in seclusion in the Scottish countryside. Only a desperate letter from his twin brother, Julian, Earl of Windham, can lure him back to England. But the favor Julian asks is the last thing Cassian wants: Julian, injured after a reckless horse race, begs Cassian to impersonate him in London and continue courting the diamond of the Season—the woman Julian intends to marry.

Daphne Bridewell once foolishly gave her heart to a rogue who broke it. Now, as the sister-in-law of a duke, she’s been granted a lavish first Season of her own. Yet, with her heart still tender, she resists the charms of London’s gentlemen, content to fade into the background and support her friend Lady Selena Montgomery, who is the Season’s reigning diamond. When one of Selena’s suitors—a charming earl she finds suspicious—asks Daphne to help him win Selena’s heart, she hesitates. But as she gets to know him, her wariness softens. He sees past her false smiles and polite conversation to the wound she hides, and she glimpses the man beneath his charm—a man of depth and unexpected sincerity.

Cassian has no interest in the beauty he’s meant to woo on his brother’s behalf. Instead, it’s her best friend—with sad eyes and an indomitable spirit—who captivates him like no woman ever has. But what will she think when she discovers his deception?