Don't Look Behind You - Lois Duncan

Seventeen-year-old April finds her comfortable life changed forever when death threats to her father, a witness in a federal case, force her family to go into hiding under assumed names and flee the pursuit of a hired killer. \nApril Corrigan's life is turned upside-down when she when she learns that her father has been working secretly undercover for the FBI. When his testimony convicts a notorious drug dealer, the whole family must relocate and enter the Federal Witness Security Program. April's entire way of life changes--not just her name. And when she attempts to communicate with her boyfriend, an agent is killed. With thrills, chills, and a high-speed cross-country chase, master suspense writer Lois Duncan will leave readers breathless