Grails Knight's "Ballparks" is a 2010 hardcover picture book that offers a unique perspective on the evolution of US baseball stadiums. The author takes readers on a visual journey through the history and modernization of these iconic structures, showcasing both the old and the new in the baseball world. With a focus on nonfiction and written in English, this book provides a comprehensive look at the topic of baseball through the lens of its stadiums, making it a must-have for fans and enthusiasts alike.