My review is only for Slan. I did not read the sequel included in this volume. I first read Slan about 40 years ago. I remembered the basic premise, and little else. I think that I liked it when I read it as a teenager. On this re-read I...didn't hate it. But I certainly didn't love it. It is a rather bellicose novel, and it very much displays the early 20th century obsession with "super-men", and the suggestion that they should be the rulers of the earth. On the plus side, women have a much more active role both in the narrative and in the imagined future social structure of this book than was common in the 30s and 40s. And the slans do contain the kernel of my favorite 70s TV characters, The Tomorrow People.