In this illustrated chapter book mystery, a secret code, creepy attic, and clever detective work all lead to the surprising conclusion of what the golden key unlocks, in the classic Jigsaw Jones series. When a new kid moves into town, he brings with him a mystery as big as his house! Reggie Armitage the III has found a box with a list of codes and a golden skeleton key--but he has no idea what the key opens or how to crack the code. It's a good thing 2nd-grade sleuths, Jigsaw Jones and Mila Yeh, are on the case. We're reissuing this beloved chapter book mystery series from James Preller with a fresh package and classic illustrations from R. W. Alley. A brand new hardcover original, Jigsaw Jones and the Case of the Hat Burglar, will also be publishing alongside these originals in Spring 2019. Featuring friendship, school, family, and a diverse community, these early illustrated chapter books are now available for a new generation of young readers.