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Other Books in Series
This is book number 3 in the Patternist series.
In a violent near-future, Asa Elias Doyle and her companions encounter an alien life form so heinous and destructive, they exile themselves in the desert so as not to contaminate other humans. To resist the compulsion to infect others is mental agony, but to succumb is to relinquish humanity and free will. Desperate, they kidnap a doctor and his two daughters as they cross the wasteland--and endanger the world.