The third book in The Seventh Tower series. The dream world Aenir is not a safe place. One wrong step can lead to danger, entrapment or death. Tal and Milla must fight their way through this shifting landscape. They are searching for the Codex, a strange and magical object that will decide the fate of their worlds. Many creatures stand in their way - from the cloud-flesh Storm Shepherds to a swarm of venomous Waspwyrms to a horrifying figure named Hazror. Tal and Milla cannot leave Aenir without the Codes. But finding it might endanger them more than they've ever dreamed.