What is a good summary of the book Don't Look Behind You?

April thought she had a normal family. She thought her father worked for an airline, but in reality, he worked for the FBI. Their lives are turned upside down when a hit is placed on him, and the family is forced to go into hiding. There are many actions that cause them to be exposed. Her brother's two toned eyes, a nosy passenger, and a letter are just a few. This story is about a family's fight to stay alive.