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In the 22nd century, humanity discovers life on an extrasolar planet, Isis: life that is lush, beautiful--and deadly. The least molecule of Isian biology kills humans painfully and horribly. Zoe Fisher has been born and bred--cloned and genetically engineered--to explore Isis. But Isis has secrets undiscovered by humanity, and Zoe herself contains secrets known only to the political powers that created her. And an act of biomedical sabotage has changed Zoe in unknown ways.
Robert Charles Wilson is the author of Science Fiction Chronicle's Best SF Novel of 1998, bestselling Darwinia, also the Aurora Award winner and Nebula and Hugo Award finalist. With Bios, Wilson has created a hard-SF novel rich in great ideas, strong writing, and the classic sense of wonder, a work that stays true to the implications of its frightful biology.