Hillary Hermes is?

This novel is set in San Juan County, Washington. Hillary Hermes once the most feared alchemist of her time. She awakens in this time as Hillary Somers, her memory is gone, and all of her inherited powers are trapped inside the body of a frail, timid, teenager who’s filled with doubt. Time has transported her through the line of the Somers Witches. Sisters Hillary and Madeline Somers will never be the same.