Alone by Megan E. Freeman
It was supposed to be a secret and fun night with her two best friends. There are a few advantages to having parents that are divorced and being able to say you are at the other parent's house is one of them. Or so Maddie figures when she sets up a fun Friday evening with her friends at her empty grandparents' apartment. But things don't go according to plan, and Maddie suddenly finds herself in a situation she never expected.
Recommended for grades 6 and up.