Yes, i remember being huge fan of Velikovsky. But the problem i found with his theory is that his description of cataclysms during recorded history
period is not supported by archaeological/geologist finds. So his books, while presenting his theories in convincing and interesting manner, lack
physical evidence. Worlds in collision did not stand alone, it was just one of his books that all were supposed to present single theory.
And the fact that his education was medical one, not connected to astrophysics is also problematic. He was very talented individual though, of course.

