Cam, her best friend Eric, and Eric’s mom are spending the day with Eric’s grandparents. But Grandpa and Grandma seem too tired to visit. Every so often, a knock at the door wakes them up. But when they go to answer, no one is there. Is a Knock, Knock Ghost on the loose? It’s up to Cam to solve the mystery!

Garden State Children’s Book Award 2017 Nominee.
© V & P Studios
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. View titles by David A. Adler
Susanna Natti is an illustrator for young readers. The books she has illustrated include The Almost Awful Play and the Cam Jansen series of books. She lives in Bedford, Massachusetts. View titles by Susanna Natti
PRAISE FOR YOUNG CAM JANSEN AND THE KNOCK-KNOCK MYSTERY:

"The stories in the this series promote logical thinking and helpfulness for young readers beginning to enjoy simple transitional chapter books." —School Library Journal 

About

Cam, her best friend Eric, and Eric’s mom are spending the day with Eric’s grandparents. But Grandpa and Grandma seem too tired to visit. Every so often, a knock at the door wakes them up. But when they go to answer, no one is there. Is a Knock, Knock Ghost on the loose? It’s up to Cam to solve the mystery!

Garden State Children’s Book Award 2017 Nominee.

Author

© V & P Studios
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. View titles by David A. Adler
Susanna Natti is an illustrator for young readers. The books she has illustrated include The Almost Awful Play and the Cam Jansen series of books. She lives in Bedford, Massachusetts. View titles by Susanna Natti

Praise

PRAISE FOR YOUNG CAM JANSEN AND THE KNOCK-KNOCK MYSTERY:

"The stories in the this series promote logical thinking and helpfulness for young readers beginning to enjoy simple transitional chapter books." —School Library Journal 

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