Forever Hidden, Treasure of Nome Series by Tracie Peterson & Kimberley Woodhouse and published by Bethany House Publications.
Havyn Powell was growing up on her grandfather Chuck Bundrant's dairy outside the 1904 gold-rush boomtown of Nome, Alaska. She had the love of her mother, two sisters, and grandfather. Havyn is determined to find a way to keep the family together, but her grandfather's health is declining and everyone seems to be holding secrets from one another, including the handsome, dark-haired stranger who recently arrived.
John Roselli heads to Nome on a mission. On his deathbed, John's grandfather asked him to deliver a box to Chuck Bundrant. This is no small task and will cost everything he has, but John is determined to honor his grandfather's wishes. But keeping his promise will forever change his life.
When tragedy strikes, Havyn and her sisters have a plan of using their beautiful voices and musical talents to perform and earn money at a local roadhouse. They're an immediate hit, and it looks like the plan will save their family. But the spotlight brings with it danger, even as it serves to draw Hayvn and John ever closer. But will they realize the peril before it's too late? Will the secrets that have been hidden for so long prove to destroy their happiness?