The Ranger (Highland Guard Series #3)

Chosen to help Robert the Bruce in his quest to free Scotland from English rule and claim his crown, the legendary team of warriors known as the Highland Guard battles on.
 
Embedded deep behind enemy lines, Arthur “Ranger” Campbell is prized for his razor-sharp senses and his ability to blend into the shadows. But when Arthur infiltrates the clan of the chieftain who murdered his father, his heart is locked on revenge. Inside he faces unexpected resistance from the sweetest of…