Moonstone Promise (Diamond Spirit Series #2)

In the second book in the adventurous Diamond Spirit trilogy, Jess's friend Luke needs help figuring out where he belongs

After a harsh childhood spent in foster care, Luke comes to Harry's place through a horse gentling program, and found the closest thing he's ever had to family. But when Harry dies, Luke's life quickly falls apart. He has a bitter falling out with Harry's son Lawson, and, afraid of becoming lost in the foster system again, Luke runs away, taking little but a moonstone pendant given to him by Jess. He finds himself camped by a river with three Aboriginal elders. Can they help him discover who he is and where he belongs?