Books by Lois Duncan

It was only an accident but it would change their lives forever.Last summer, four terrified friends made a desperate pact to conceal a shocking secret. But now, someone has learned the truth, and the horror is starting again. There is an unknown avenger out there who is stalking them in a deadly game. Will he stop at terror--or is he out for revenge?This summer, four friends are going to learn that some secrets just won't stay buried.

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.

The plan was only to scare their English teacher...They never actually intended to kill Mr. Griffin. But sometimes plans go wrong.