Mockingbird

World Fantasy Award nominee 1999, Nebula Award nominee 1999, Tähtifantasia Award nominee 2008.
Toni Beauchamp never liked her mother's world of magic and visions and six strange gods that took over her body at will. So when her mother died, Toni and her sister Candy thought it meant a new beginning, a life free of magic. But Elena had one last gift for her daughter – a sip from the Mockingbird Cordial. And from the moment Toni held the drink to her lips, her life would never be the same...
Sean Stewart
Sean Stewart (born 1965) is a U.S.-Canadian science fiction and fantasy author.
Born in Lubbock, Texas, Sean Stewart moved to Edmonton, Alberta, Canada in 1968. After stints in Houston, Texas, Vancouver, British Columbia, Irvine, California and Monterey, California, he now lives in Davis, California, with his wife and two daughters.
Stewart received an Honors degree in English from University of Alberta in 1987, following which he spent many years writing novels. He gradually moved from writing novels to interactive fiction. He served as a consultant on several computer games, and is on the management team of the marketing and entertainment company.
Links
Home page.
Source: Wikipedia.