Take Sitchin's work with a grain of salt. He was not a linguist and didn't speak Sumerian.
I'd highly recommend listening to this interview, from Red Ice Radio, of scholar Michael Heiser, who is a linguist, and who does read and speak Sumerian. He exposes Sitchin's shoddy work:
Michael Heiser: Sitchin is Wrong
(Note: this interview won't be available to the public much longer without subscription fee, so if you are interested, you should download it now.)
I'd highly recommend listening to this interview, from Red Ice Radio, of scholar Michael Heiser, who is a linguist, and who does read and speak Sumerian. He exposes Sitchin's shoddy work:
Michael Heiser: Sitchin is Wrong
(Note: this interview won't be available to the public much longer without subscription fee, so if you are interested, you should download it now.)