Dark Ruby by Laura Landon

To escape the memory of a horrific kidnapping that he barely survived, Alexander Linscott, Marquess of Halverston, flees to one of his country estates determined to master his demons. But when Mrs. Daisy Moore arrives on his doorstep applying for the position of housekeeper, he knows his life has taken an unexpected turn. She is clearly not who she pretends to be.

Lady Isobel Culver has no intention of falling in love. She’s on the run and can’t afford to risk giving her heart to anyone, especially a man as tortured as the Marquess of Halverston. But when fate intervenes and brings her to the altar with the murderous villain her father intends for her to marry, Alexander becomes the only man who can save her. If loving her doesn’t cost him his life first.