(From the publisher):
The city of Metru Nui is divided into six parts. Each part has a guardian -- a Toa -- who watches over the Matoran who live there. However, something strange is happening: Matoran are vanishing and it's up to the Toa to find them and to discover what is causing the disappearances. Do the Toa have the skills to solve this mystery? Or will they finally meet their match?
Original title: Mystery of Metru Nui
Genre: Fiction→ Children & Young Adult→ Fantasy→ Fantasy Worlds
Fiction→ Children & Young Adult→ Science Fiction→ Futuristic Societies