What the Murky Waters Hide

My name is Billy. I live in a house on a cliff. And the cliff is on an island. I am eleven. But I am nothing like my peers. After all, I am a real scientist. Yes, yes. A marine... biologist. And recently I had to become a detective too… All because that girl, Olivia, went missing. And the police couldn't do anything. They found not a single clue. But I found one. I was there that night. And I saw something important. And also: no one knows these sands and rocks, the bays and caves better than I do… You probably haven't read anything like this. The investigation led by Billy has a special style. But soon the boy finds himself at the very center of a web of lies and family secrets. His childhood game of detective turns into a race for survival. He becomes a target for a killer he knows well. And now he must solve this case in order to save his life…