Treasure on Lilac Lane. Jewell Cove, #2

Forgiveness and healing pave the way to romance in this friends-to-lovers story from Donna Alward's Jewell Cove series. Rick Sullivan left the Marines with a prosthetic and PTSD. His life is going off the rails, especially when a mysterious necklace in a safe deposit box holds the key to his true identity. But he's determined to get his act together, especially where Jess Collins is concerned. The dark-haired beauty makes him want to be a better man than the one who left the service.
Jess Collins has fought hard for her new life, so watching Rick destroy his has been infuriating. But falling for him is easier than she ever imagined. Beneath the damaged exterior is a tender heart and a fierce protector-the kind of man she's needed all along. But everything Jess has worked for is at risk when her abusive ex comes back to town, threatening her peace and security. Meanwhile, Rick learns the secret of the necklace, and it challenges everything he thought he knew.
He'd lay down his life to protect Jess, but how can he give her his heart when he's no longer sure of who he is?