The Ghost Tower — Thomas K. Carpenter

Finally reunited with his friends, Terran faces a blight which threatens the health of Mother Tree.As they hunt down the source of the rot, each of the companions struggle to find their place within the group. Together they learn that their world is not the new home for their gaming minds that they expected, but one with a long dangerous history. If they cannot sniff out the cunning traps that have been laid before them, then they'll end up like everyone else who has been thrust into these troubled lands—dead.