Thanks, I will search Amazon.
This one looks interesting. It's listed at Amazon. http://www.velikovskian.com/sagan.htm
I found the whole business a bottomless pit when I read V's books + criticisms in the early 70s. Sagan hadn't burst onto the scene at the time. Things may be a bit clearer 35 years later, not necessarily because of Sagan's efforts. Good luck.
"Billions and Billions"
Bottomless pit is a good description. I was totally enamored with Velikovsky from ‘67 through ‘71. I went to see him at a conference at Lewis & Clark College in Portland back then. His books were thrilling to read and he was probably a genius. He could be correct in his reinterpretation of Egyptian history, but I no longer believe that his catastrophes happened in the way he posited in historic time, or that his theories offer much to explain human history. Too much detail work has been done by diligent geologists, tree ring and carbon 14 experts, geneticists and historical anthropologists since 1950 that confirms a more uniformitarian interpretation of history and geology.