01380cam a2200325 i 4500 220188991 TxAuBib 20150611120000.0 150529s2015||||||||||||||||||||||||eng|u 9780142422250 pbk. $3.99 0142422258 pbk. $3.99 TxAuBib rda Adler, David A. Young Cam Jansen and the knock, knock mystery / by David A. Adler ; illustrated by Susanna Natti. New York, New York : Penguin Young Readers, an imprint of Penguin Group (USA) LLC, 2015. 31 pages : color illustrations ; 23 cm. txt rdacontent n rdamedia nc rdacarrier Penguin young readers. Level 3, Transitional reader Penguin young readers Level 3 Eric's Grandma Minnie and Grandpa Max keep hearing someone knock at their door, night and day, but find no one there, so Cam tries to solve the mystery using her amazing memory. 20150611. Memory Fiction. Grandparents fiction. Mystery and detective stories. Natti, Susanna, illustrator. Penguin young readers. Level 3, Transitional reader. Penguin young readers Level 3.