This collection of five novels (two different cycles) is must-have if you like SF. Too bad there is not more of this type of volume on this major writer, novels come with a dropper and are exhausted in a few years we can still always find "the fauna of the area" and "in pursuit of Slans" if you do not know the author and do not want to invest in a large volume. My purchase is not checked because this is at least 25 years that I have this volume of the collection "omnibus". Back cover: Who is Gilbert Gosseyn? He, at least, he knows it. Completion day he discovers that lon faked his memory. This is a real abyss that opens beneath his feet. Unknown take chase and kill it. In life, his troubles would be over. In an ordinary novel too. But "The World of Non-A" is not a novel like no other. Immediately after his death, Gilbert Gosseyn resurrects: they hold another body. Robert Hedrock is the new favorite of Empress Innelda Disher, Completion day she lidentifie as a spy Armorers these diehard dissidents. He did that time to flee to find himself a prisoner of Gunsmiths, who do not understand how he made to sintroduire among them. They séclairciraient things so lon admitted that he is immortal and that for five thousand years it still has the same hidden purpose, perhaps unreachable. Gosseyn, Hedrock: men who, each in his way, passed through the doors of léternité.