David A. Adler (www.davidaadler.com and www.camjansen.com) is the author of more than 175 children's books. Before becoming a children's book author, he taught math and science, and completed master's degrees in marketing and economics. He lives in Woodmere, New York.
"What wrongdoer is any match for Cam Jansen, the girl with the amazing photographic memory?" ( Booklist) "An uncluttered plot, a clever heroine, clear language, and a dash of humor make for a zestful mystery."(School Library Journal)