Last Kiss of Summer by Jessica M. Felleman

A beautiful, heartbreaking love story about two teens who find their way back to each other through a second chance romance.

Nothing breaks like a heart.
When Sera Watkins and her family arrive at their summer house on Cape Cod, she has one goal in mind: protect her heart from the boy who broke it, her next-door neighbor, Luke Tisdale. The problem is, Luke still has a piece of her heart—literally. When Sera received a new heart as a baby, the healthy valves of her old heart were given to Luke. Forever bonded, Luke and Sera grew up together spending sun-soaked days swimming at their secret beach and painting at art camp.
Then, two summers ago, their friendship almost turned into something more. Key word: almost. Because one fateful night, everything changed. Sera’s health took a turn for the worse. A family secret sent Luke spiraling. And they weren’t there for each other when it mattered the most.

Now Sera is ready for a fresh start, which means no more pining over the boy next door. But Luke has grown up a lot since she last saw him, and the chemistry she felt two summers ago? It’s still there. Sera isn’t sure she’s brave enough to risk it all again, but when she gets some difficult news, she realizes there’s no time to waste. Maybe it’s finally Luke and Sera’s moment, their chance to enjoy the sweet kiss of summer together—before it’s too late.