The House in the Pines — Janis Susan May

Hired to write the biography of elderly tycoon Henry Wolfe, Dianne Grayson happily comes to Wolfe House, a Victorian mansion set deep in the piney woods of East Texas… a house she has always wanted to see. Henry Wolfe is just as autocratic and overbearing as she expected, but no matter how he acts she is determined to stay there until she gets the answers she wants. What she did not count on was his rugged grand-nephew and a startlingly handsome and attentive young cowboy, both of whom show great interest in her, nor how the mysteries of the past can affect and endanger the present day. Once she discovers the truth, is it too late for her to save her own life?