Portcullis — Graeme Butz

After a shocking home truth for Alec, most of the events in this third book take place on the school camp at the remote lagoon, where old rivalries and suspicions merge with new events and characters. Who is leaving threatening messages at the campsite? What mystery lies at the bottom of the school lagoon? Why do most of Alec's closest friends turn against him? Alec's nemesis returns with some unusual developments, and his friend Rod is cast in a new light. A final conflict with a member of the school staff sends Alec into deeper confusion, setting the scene for a dramatic revelation in Book 4.