In the fourth and final book of the Winter Secret Series, the mystery and suspense from the previous books continue as the past finally engulfs Derek and Cynthia, consumes their future, and threatens to destroy the love they have struggled to keep. Will the autumn season bring peace to them, or does it only harbor destruction and death? The new adventure takes place in Derek's ancestral castle located high in the mountains of Montana. When he returns with Cynthia to reclaim his birthright, he is met by resistance from its inhabitants, who refuse to acknowledge his entitlement. The fortress hides many secrets behind its cold granite walls that could be the answers to all the questions. The seeds from the ruthless past are still alive after decades and are determined to keep all the secrets, no matter who must be sacrificed. As they face a terror never before known, the couple must choose between life and death before they can be free. Autumn Hush is the fourth book in the four-book Winter Secret Series, each encompassing a season in the suspenseful lives of Derek Flynn and Cynthia Morrison.