Lost and Found

"'Someone is stalking me!'...Darcy Wills is in big trouble. And she does not know where to turn for help. First there was the mysterious stranger who started following her. Then there was the threatening note left on her desk at Bluford High School. And now her sister has disappeared. Forced into a desperate race against time, Darcy must take action to save her sister--and her fragile family--before it is too late"--Book description.