graphic of a silhouette with a multicolored pixellated brain, against a backdrop of pink rectanglesWayt Gibbs (@WaytGibbs) contributed original reporting and editing to a new book, “Autism by the Numbers: Explaining its Apparent Rise,” published by Spectrum and free to read online. The book explores the puzzling and dramatic recent rise in autism prevalence around the world and provides research-based insights into the several possible factors that could be driving the trend, such as increased screening and a variety of biological factors like genetics and the mother’s health during pregnancy. The book aims to help readers make sense of the huge body of diverse and sometimes contradictory research on autism, its prevalence and its potential causes. Image by MissLunaRose12 via Wikimedia Commons