01383cam a2200361 i 4500 162700417 TxAuBib 20140625120000.0 130807s2014||||||||||||||||||||||||eng|u 2013027008 9780670012619 0670012610 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, 2014. 31 pages : color illustrations ; 24 cm. txt rdacontent n rdamedia nc rdacarrier sti rdacontent rdamedia rdacarrier 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. 20140625. Jansen, Cam (Fictitious character) Juvenile fiction. Memory Fiction. Grandparents Fiction. Mystery and detective stories. Natti, Susanna. Penguin young readers Level 3.