He was the boy she loved. Now he’s the man who could ruin her.
When Katherine’s father dies, she expects freedom—an inheritance that would finally let her choose her own path. Instead, his final will binds her to a stranger: marry her distant cousin, Cillian, within a month or be left with nothing.
But Cillian isn’t just any cousin. He’s the broken boy from a summer long ago—the one she once gave her heart to. And he’s back, not as the gentle boy she remembered, but as a man forged by war, betrayal, and bitterness.
Cillian has no intention of falling in love. Her father destroyed his life, and marrying Katherine is the final piece in his quiet vengeance. But when the girl he expected to hate turns out to be his fiercest temptation, Cillian begins to question everything—especially the fire that still burns between them.
Desperate to survive the marriage and cling to her pride, Katherine writes a farewell letter to her childhood love… only to mistakenly send the one revealing her plan to win her husband’s heart.
What was fragile becomes explosive.
Betrayed, Cillian gives her one month to leave. But Katherine is carrying more than heartbreak—she’s pregnant. She vanishes to protect the life growing inside her, not knowing the man she fled from might be the only one who can truly love her.
When Cillian discovers the truth, he must confront the past—and decide whether to cling to the ruins of his pain or chase the only future that ever mattered.
The Summer Heir is a searing romance about duty, revenge, and two shattered hearts fighting for a second chance.