Secrets in the Night by Amanda Ashley

Freelance photographer Skye Somers goes to the Natural History Museum to photograph their Native American Exhibit. While there, she becomes enchanted by a life-sized cardboard cutout of a Lakota warrior identified as Wolf Who Walks on the Wild Wind, little knowing it will change her life forever.
Jason Wolf has the unique ability to travel between the present and the past. He is intrigued by the woman who is obviously smitten by his likeness in the museum. Wanting to know her better, he arranges to meet her.
Skye is stunned by Jason’s resemblance to a man who lived over a hundred years ago, and by the undeniable attraction that immediately sparks between them. In time, she discovers that the reason Jason looks so much like Wolf Who Walks on the Wild Wind is because they are the same man. But that isn’t the only secret he’s been hiding in the night…