Green Millennium, written by Fritz Leiber, is a captivating science fiction novel that explores themes of environmentalism, time travel, and the potential for humanity to change its destructive ways. The story follows the protagonist, Amalfi, as he is recruited by a mysterious alien creature to help save the Earth from imminent destruction.

Leiber's writing style is engaging and thought-provoking, allowing readers to become fully immersed in the world he has created. The character development is well-done, with Amalfi undergoing a significant transformation throughout the novel as he grapples with his past and his beliefs about the future.

One of the standout aspects of the novel is Leiber's depiction of the Green Millennium itself - a realm of lush greenery and tranquility that stands in stark contrast to the polluted and barren Earth that Amalfi knows. The concept of a second chance for humanity is both hopeful and cautionary, serving as a powerful reminder of the consequences of our actions.

Overall, Green Millennium is a compelling and thought-provoking read that will leave readers pondering their own impact on the environment and the possibilities for a better future. Leiber's masterful storytelling makes this novel a must-read for fans of science fiction and environmental literature alike.

Book Description:
From the classic science-fiction and fantasy author Fritz Leiber comes this intriguing tale of a green cat. From the author's introduction: "The world Phil Gish lived in was not a pretty one, and Phil didn't enjoy living in it. He was disillusioned, purposeless, hopeless, and haunted by the fear that a robot would take over his job. But then Phil was a timid person, not much given to adventure seeking. If he hadn't been so mild he might have found his kicks at All Amusements, the syndicated playground where anyone could find fun, providing he had the proper sadistic and otherwise aberrated elements in his personality. But Phil was good—and bored. And then one day a cat perched on his window—not an ordinary cat—a green cat. For the first time in years Phil was happy. He promptly named the cat Lucky because he somehow knew that as long as the cat stayed with him he'd feel fine. But Lucky didn't stay long. In a matter of minutes he had disappeared into All Amusements park. It was then that Phil became involved in a grotesque world, peopled with the most extraordinary personalities. Just what the cat is and its ultimate meaning is the secret of it all. You will be surprised." - Summary by Larry Wilson