Final answer:
Eric Schlosser is the author of Fast Food Nation, a book that investigates the impact of the fast food industry on various facets of society.
Step-by-step explanation:
The author of Fast Food Nation: The Dark Side of the All-American Meal is Eric Schlosser. Published in 2001, Schlosser's book is a significant piece of investigative journalism that delves into the various aspects of the fast food industry, including its impact on society, economy, and health. It critiques the business practices of major fast food chains and examines their effects on consumers and workers within the industry.