Book excerpt: A father's inspiring portrait of his daughter informs this classic reassessment of the "epidemic" of autism. When Isabel Grinker was diagnosed with autism in 1994, it occurred in only about 3 of every 10,000 children. Within ten years, rates had skyrocketed. Some scientists reported rates as high as 1 in 150. The media had declared autism an epidemic. Unstrange Minds documents the global quest of Isabel's father, renowned anthropologist Roy Richard Grinker, to discover the surprising truth about why autism is so much more common today. In fact, there is no autism epidemic. Rather, we are experiencing an increase in autism diagnoses, and Grinker shows that the identification and treatment of autism depends on culture just as much as it does on science. Filled with moving stories and informed by the latest science, Unstrange Minds is a powerful testament to a father's search for the truth.