Secondary Level 3: The Lost Chronicles part 1 - book

Oceanic Flight 815 has crashed on an island in the Pacific Ocean. Forty-eight people have survived, but no one knows where they are. Each day the survivors discover more about the island and themselves. Who recorded the sixteen-year-old radio message that plays over and over again? Are they alone on the island? And will they be able to escape from the island and their own pasts?