A picture book biography of Irena Sendler, a Polish Catholic social worker who helped save nearly 2500 Jewish children during the Nazi occupation of Poland during World War II.

Marcia Vaughan Crews has written numerous books for young readers, including picture books, beginning readers, and both fiction and nonfiction series. She was inspired to tell Irena Sendler's story after reading her obituary in 2008 and discovering more about her through the work of Life in a Jar: The Irena Sendler Project, an organization dedicated to bringing Irena Sendler's story to the world. Crews lives in Tacoma, Washington.

Ron Mazellan is the illustrator of several award-winning picture books. He is also a professor of art at Indiana Wesleyan University. Mazellan was drawn to this story by Irena Sendler's character and her multiple selfless acts of kindness and courage toward those who had little hope of survival. Mazellan lives in Marion, Indiana.