The Alpha's Quest - Shifters of Grey Ridge, #5

Ethan leaves the only home he's ever known on a mission to find those responsible for attacking Grey Ridge, and to find a mate of his own. Guilt consumes him over the near death of his friend's mate. He won't return as beta until he's proven he can protect his pack. Nothing will distract him from his quest for justice, including finding his fated mate. No matter how much it hurts. When a handsome stranger beats down Belle's door and turns her world upside down, she knows she'll never be the same.
With her mate in danger, Belle will do anything to help him, including putting her future happiness, and her life, at risk by going undercover with the enemy. Nobody will stop her doing whatever it takes, but will her mate be able to forgive her. This is book 5 in the Shifters of Grey Ridge series, a steamy wolf shifter romance with rejected mates and a happily ever after.