When seventeen-year-old Elizabeth hears that her twin, Isabel, has been murdered, she slips into her place and tries to find the murderer.

Relates the stories of a pair of identical twin sisters, a schizophrenic and a psychiatrist, in an account that traces the deterioration of the favored sister into mental illness, and the other's emergence from her troubled sibling's shadow.

Twin sisters who already compete for their mother's attention have an especially hard time after their baby sister is born.

"Maureen and Francine Carter are twins and best friends. They participate in the same clubs, enjoy the same foods, and are partners on all their school projects. But just before the girls start sixth grade, Francine becomes Fran -- a girl who wants to join the chorus, run for class president, and dress in fashionable outfits that set her apart from Maureen. A girl who seems happy to share only two classes with her sister! Maureen and Francine are growing apart and there's nothing Maureen can do to stop it. Are sisters really forever? Or will middle school change things for good?"--Provided by publisher.

An ancient prophecy divides two sisters- One good... One evil... Who will prevail? Twin sisters Lia and Alice Milthorpe have just become orphans. They have also become enemies. As they discover their roles in a prophecy that has turned generations of sisters against each other, the girls find themselves entangled in a mystery that involves a tattoo-like mark, their parents' deaths, a boy, a book, and a lifetime of secrets. Lia and Alice don't know whom they can trust. They just know they can't trust each other.