When Luke and Sophie are school-newspaper reporters at a Gadget Fair, they notice small signs in strange spots around the building saying Thanks Hero, and they set out to find out who is behind the signs.
Lisa Thompson
Milita Molina
Peter Watt
Agatha Christie
Oliver B. Linton
George E. Haggerty
Thomas H. Marwick
Hans Faverey
Egmont Books
Kincses, Előd.
Louise Thorley
Jungle Tales
Georg Ebers
Leo Tolstoy
Laura Lee Hope
Eugene Field