BIONICLE Adventures 4: Legends of Metru Nui

Legends of Metru Nui is the fourth Bionicle Adventures book and came out 2004. It was the novel for the second Bionicle movie.

Story
Toa Metru were given mysterious Toa Stones and transformed into Toa in the Great Temple on Metru Nui. They found the Great Disks, extraordinary Kanoka Discs, that had great power, and went to the Coliseum, where they expected to be hailed as heroes. However, they were accused as the traitors responsible for Toa Lhikan's disappearance by Turaga Dume and were almost killed by his 'test' (he wanted Toa Metru to pass through an artificial Sea of Protodermis, which meant that the floor was 'attacking' them). Three Toa were captured by Vahki trying to escape the pursuers. In prison, they met a mysterious Turaga who turned out to be Lhikan. On the surface, the remaining Toa faced Vahki and Dark Hunters. In the end, Turaga Dume pulled off his mask and was revealed as Makuta. After a long struggle the Toa eventually defeated Makuta.

Characters
Toa Villains Other
 * Vakama
 * Nuju
 * Whenua
 * Nokama
 * Matau
 * Onewa
 * Lhikan
 * Makuta
 * Nidhiki
 * Krekka
 * Turaga Dume
 * Jaller