I have an extensive library of biblical books including ones that are referenced in our bible but not included. My hubby reminded me of Jashar. It is mentioned in Joshua 10:13 & 2 Samuel 1:18, so this was a book around that the ancient Jews read. He remembered a chapter on Nimrod.
Here are some quotes from this book Jashar XI 1 And Nimrod son of Cush was still in the land of Shinar, and he reigned over it and dwelt there, and he built cities in the land of Shinar 2 And these are the names of the four cities which he built, and he called their names after the occurances that happened to them in the building of the tower. 3 And he called the first Babel, saying, Because the Lord there confounded the language of the whole earth;
Verse 6: And Nimrod dwelt in Babel, and there he renewed his reign over the rst of his subjects, and he reigned securely, and the subjects and princes of Nimrod called his name Amraphel saying that at the tower his princes and men fell through his means. 7 And notwithstanding this, Nimrod did not return to the Lord, and he continued in wickedness and teaching wickedness to the sons of men;