File:The Lost Book of Enki.jpg

The Lost Book of Enki, authored by Zecharia Sitchin, recounts the origins of man from the perspective of the Anunnaki. It also touches on their relationship with the IGIGI class. In early Mesopotamian studies, the IGIGI’s origins are that of the Anunna (Kienast 1965: 143). The Akkadian empire used the Semitic expression IGIGI to differentiate from the Anunnaki,[2] often as rival groups. The Old Babylonian period gave the IGIGI netherworld status (Black and Green 1998: 34).

According to Sitchin’s The Lost Book of Enki the IGIGI were seen as frequent rebels who defected to Mars some million years ago.