Lady of Hay, by Barbara Erskine, is free in the Kindle store and from B&N. This title was part of the 99 cent sale from Sourcebooks last March, so you may already have it in your library.
Book Description
An iconic, groundbreaking novel about the power of destiny with more than 3 million copies sold
With a mesmerizing, wrenching story set both in the present day and the 12th century, Lady of Hay explores how Joanna, a journalist investigating hypnotic regression, plunges into the life of Matilda, Lady of Hay—who lived 800 years earlier. As she learns of Matilda’s unhappy marriage, her love for Richard de Clare, and the brutal treatment she receives from King John, it seems that Jo’s past and present are hopelessly entwined and that, centuries later, a story of secret passion and unspeakable treachery is about to begin again—and she has no choice but to brave both lives if she wants to shake the iron grip of history.