Heiser's work is all grounded in the Bible and in Sumeria/Mesopotamian literature...and it supports what was thought to be true by many authoritative Biblical scholars at the time of the Birth of Christ and before.
Zecharia Sitchin was a fraud and an insurance agent who made up his own translations ... Anyone can find the Sumerian dictionary online today and make their own translations of anything Sumerian and none of that will even approach Sitchin’s fairy tales