The "Who Was Rosa Parks?" book in the "Who Was?" series by Penguin Workshop is a paperback illustrated biography intended for ages 9-12. Written by Yona Zeldis McDonough and illustrated by Nancy Harrison, this nonfiction book provides a detailed account of the life of Rosa Parks, a prominent social activist in the United States. The book covers topics such as prejudice and racism, making it a valuable resource for young readers interested in learning about important figures in American history.