ichael Chambers recounts recent events on Earth after the arrival of a alien space craft. The aliens, known as Kanamit, seem friendly and assure everyone they have nothing to be afraid of. In fact, they offer to share wonderful technology that will provide limitless energy, cure all disease and convert deserts into lush gardens. For the people of Earth, paradise has arrived. Chambers is an encryption specialist and they try their best to decrypt a book the Kanamit left behind. The book's title seems benign - but it's not what they think it is.

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