The two books are complementary. Certainly I'm not going to forward an explanation of why a mamoth would die and freeze in the ice, rapidly enough to preserve it as edible, even though the animal had undigested grass in it's stomach. But it's certain the cause was neither Venus nor Mars bumping into the Earth's magnetosphere as proposed and altering the axis of rotation. And definitely not within human memory. Nope. Didn't happen. Sir Isaac Newton forbids it.
I don't know what your background is and I'm just a layman who reads a lot about this stuff (with what little free time I have). I would love to see Velikovsky debunked but at this point I'm still keeping an open mind. My first question to you is what, of the anomalies descibed in his book, are the explanations that we have today? Why in the world are there huge masses of mammoth bones (and other animals) piled up in Alaska and Siberia, shattered and mixed in with gravel and broken trees? What of the caves in England and the other anomalies in the book?
Another thing that bothers me is why don't we learn about these anomalies? Are they really anomalies if there is evidence across the globe? I don't have the book with me to pull examples so I'm just going by memory. I'm not a Velikovsky apologist but it is interesting to me that only in his books do I hear about evidence like this.
You sound like you know what you're talking about and you seem familiar with Velikovsky so I'd love to hear what you have to say- like I say I have an open mind.