David A. Adler graduated Queens College in 1968 with a BA in economics and education and licenses to teach mathematics and history. He then worked for nine years as a New York City mathematics teacher. While teaching he studied at New York University and in 1971 was awarded an MBA in marketing. He began work on a PhD in marketing when inspiration struck and he wrote his first book, A Little at a Time (Random House, 1976). Suddenly his focus changd from marketing to writing. In 1973 he married Renee Hamada, a psychologist, and in 1977 their first child, Michael, was born. By that time David had written several books. He was granted a child-care leave from teaching and while Renee continued to work, David stayed home, took care of Michael, and wrote in earnest. It was during his first year on leave that he wrote Cam Jansen and the Mystery of the Stolen Diamonds. The mystery and its solution were inspired by baby Michael and all the things David needed to take along each time he took Michael outside. This was the first of almost fifty Cam Jansen Mysteries all published by Viking Press and Puffin Books. The Cam books have been translated into many languages including Spanish, Japanese, German, Swedish, Danish, Hebrew, and Korean. He is also the author of the Jeffrey Bones Mysteries published by Viking and Puffin. David's Andy Russell series was inspired by another family member and the many adventure the family had with his enthusiasm and his pets.