Black Rainbow — Barbara Michaels

By the light of a gilded moon, a mysterious black rainbow framed the huddled towers of Grayhaven Manor, a vision of ominous beauty that seemed to warn Megan O'Neill of a darkness within. As the estate's new governess, her apprehensions were banished by the welcome of the Mandeville family. But Megan's growing obsession for her darkly handsome employer blinds her to the terrifying truth of Grayhaven. Now Megan is about to learn the price of desire...