Spring semester at the Lab School in Hyde Park finds Petra and Calder drawn into another mystery when unexplainable accidents and ghostly happenings throw a spotlight on Frank Lloyd Wright's Robie House, and it's up to the two junior sleuths to piece together the clues. Stir in the return of Calder's friend Tommy (which creates a tense triangle), H.G. Wells's The Invisible Man, 3-D pentominoes, and the hunt for a coded message left behind by Wright, and the kids become tangled in a dangerous web in which life and art intermingle with death, deception, and surprise.
"Suspenseful, exciting, charming, and even unexpectedly moving."
For Ages: 9 - 12 years old
For Grades: 3 - 7
Number Of Pages: 352
Published: 1st June 2007
Country of Publication: US
Dimensions (cm): 19.5 x 13.3 x 1.9
Weight (kg): 0.36