These new graphic novels in the Heroic Animals series tell about several animals that became famous for their acts of service. In five brief chapters, each book details the central animal's background and training (if any), or how it came to serve, as well as its notable achievements. Corporal Wojtek was a bear that was officially inducted into the Polish army during WWII in order to remain with the unit that had adopted him in the Middle East--and was later promoted for his role in the unit's supply work. Patron has served as a mine-detecting dog in the recent conflict in Ukraine, where he also became a symbol of anti-mine education for children. Scarlett was a stray cat who rescued her five kittens from a burning building in Brooklyn, New York. Trakr was a police dog who may have helped locate the final survivor from the World Trade Center following the 9/11 attacks. The dramatic settings and charismatic animal subjects in these books lend themselves well to graphic-novel treatment. A recap of the animal's story, a glossary, a "read more" section, and author/illustrator biographies in the end matter provide the requisite nonfiction elements for academic use.

The books will likely appeal to animal lovers and to fans of disaster series such as I Survived. Because the books deal with war and disaster and include some vivid illustrations, the content is best suited for readers prepared for these difficult elements.