I agree that the images are grizzly and captivating for this reason alone. There is something shocking about a "simple" animal killing a "higher" animal. Nothing unusual about lizards eating spiders and insects, they do it all the time, but there seems to be something "wrong" with a spider reversing things and eating a lizard
So while I appreciate your comment, these photos may find their way into a book someday, but I honestly don't think they have any more value than that. The shots themselves really aren't all that great, but there is a certain drama about them I suppose.
Still, even if the air were perfectly still, and I was able to compose a tripod-taken shot in the best possible light, I just can't see someone hanging one of these on their wall