 I was very excited about reading this book when I first got it. It's from the classic golden age of early science fiction. Unfortunately, it's not good. I didn't think it was very creative or imaginative or really very interesting at all. The Medusins are a race of aggressive aliens that look like floating green jellyfish the size of elephants with hundreds of black tentacles and they've kidnapped some princess or something and the space legion has to fly to the Medusin homeworld to rescue her and blah blah blah. It's all very basic.