Darkness of Slumber, by Rosemary Kutak (epub/Kindle/pdf)
Put death to the weird music of insanity. Take murder in the madhouse. Add a perfect wife about to lose her husband because his first wife may return from a living grave. Mix seven strangely assorted lives weaving dark patterns of political intrigue and violence -- and let a young doctor, with a reputation to clear, uncover the sequence of events behind the too sudden madness of a beautiful woman.
Acclaimed as one of the "Ten Best" by the New York Times Book Review, here is an engrossing mystery of sinister emotions and pounding action, told with mounting tension and terror.