The Official Guide to BIONICLE

Written in 2003, it describes the Toa Nuva, the Turaga, some Matoran, the villages, Makuta, Protodermis, Rahi, Bohrok, Bohrok-Kal, Rahkshi, the Takanuva, and a few other things. It includes a map of Mata Nui, quizes/tests, and a key to the Matoran language. some of the information in this book is outdated, though, as it was written 7 years ago.