Nurse and avid backpacker Aimee Donovan never expected her life to change during an overnight hospital shift. When a strange patient claims to be a time traveler and offers her the chance to spend three months in the Yellowstone wilderness two hundred years in the past, she agrees, but there is one condition. She must never reveal the truth about who she is or where she comes from.At the dawn of the mountain man era, trapper Daniel Osborne encounters a woman who appears in his mountains seemingly out of nowhere, carrying secrets she refuses to share. Protective by nature and bound by the realities of frontier life, Daniel is drawn to Aimee's strength and spirit, and she stirs feelings he never expected, even as her half-truths test his trust.As Yellowstone's beauty and danger pull them closer together, Aimee faces an impossible choice: protect Daniel's world with her silence, or risk destroying it with the truth.Yellowstone Heart Song is a romance-first time travel novel set in the untamed wilderness of early Yellowstone, where love, survival, and the pull of two centuries collide.