The classic first-contact science fiction novel that launched the career of Jack McDevitt, the nationally best-selling author of Coming Home - now revised from the original edition, and featuring a new foreword.
From a remote corner of the galaxy, a message is being sent. The continuous beats of a pulsar have become odd, irregular...artificial. It can only be a code.
Frantically, a research team struggles to decipher the alien communication. And what the scientists discover is destined to shake the foundations of empires around this world - from Wall Street to the Vatican....
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