"Eden", written in 1959, opens the period of Lem's mature science-fiction. What makes us read this book with interest today? Certainly author's exceptional imagination plays an important role here; rich visions of planetary culture and nature are presented with just the right amount of suspense. Hence, we get to know the mysterious planet step by step – with a tension that naturally accompanies all real history of exploration. Political system of the planet must have reminded readers of Orwell's visions, particularly in the 1950s. Yet the most important issue seems the skepticism with respect to the possibility of mutual comprehension: the very difference of respective technologies prevents newcomers and locals from understanding each other.
Lem is both a polymath and a virtuoso storyteller and stylist. Put them together and they add up to a genius... He has been steadily producing fiction that follows the arcs and depths of his learning and a bewildering labyrinth of moods and attitudes. Like his protagonists, loners virtually to a man, his fiction seems at a distance from the daily cares and passions, and conveys the sense of a mind hovering above the boundaries of the human condition: now mordant, now droll, now arcane, now folksy, now skeptical, now haunted and always paradoxical. Yet his imagination is so powerful and pure that no matter what world he creates it is immediately convincing because of its concreteness and plentitude, the intimacy and authority with which it is occupied... read Lem for yourself. He is a major writer, and one of the deep spirits of our age.
Theodore Solotaroff "The New York Times Book Review"