Cam Jansen: the Green School Mystery #28

David A. Adler is the author of more than 200 books, ranging from children’s series to books on math, science, and economics. His work includes the Young Cam Jansen series, the Andy Russell series, and a number of nonfiction and picture biography titles. He lives in Woodmere, New York.

Joy Allen is an Author/illustrator whose titles include Baby Signs, Princess Party and Baby Sounds. She is also the illustrator of the Cam Jansen,series. She currently lives in Cameron Park, California. You can learn more about Allen and her work at joyallen.us or joyallensjoybox.com