If You’re Lucky by Yvonne Prinz
When Georgia’s brother drowns while surfing halfway around the world in Australia, she refuses to believe that Lucky’s death was just bad luck. Then a stranger named Fin arrives in False Bay claiming to have been Lucky’s best friend. Soon Fin is working for Lucky’s father, charming Lucky’s mother, dating Lucky’s girlfriend. Georgia begins to wonder: Did Fin murder her brother in order to take over his whole life?
To uncover the truth about Lucky’s death, Georgia secretly stops taking the medication that keeps away the voices in her head. But as her suspicion grows, her mental state becomes more and more precarious. Is Georgia’s mind playing tricks on her, or is the entire town walking into the arms of a killer who has everyone but her fooled?