fun book, solvable puzzles, (although to be truthful, I did not attempt to solve the illustration puzzle). I'm really lazy that way. great illustrations by Bret Helquist, interesting characters, and a wonderful, strong, sense of place. I want to be twelve and live in Chicago and go to their school.
Petra and Calder are smart, Chicago kids who connect circumstances and think in new ways to solve a mystery of a missing Vermeer painting. Some supernatural elements. Illustrations with clues and codes.