Summerlost by Ally Condie
It has been an entire year since the fatal accident that took Cedar's brother Ben and her father too. What's left is spending the summer in the town of Iron Creek. No stranger to this town, a town that her mom grew up in, they must try to mend the broken pieces of their life.
One day Leo, a boy in costume, rides by Cedar's house and everything changes. soon Cedar is working with Leo at the Summerlost Theater Festival. Their friendship grows as they piece together clue about a famous actress, whose short and tragic live is a mystery.
Must read it yourself to find out if they solve the mystery.