NANCY DISCOVERS DINOSAUR FOOTPRINTS IN HER OWN BACKYARD!
The most annoying boys in Nancy''s class offer her a deal. If she can prove that a giant footprint they''ve found on the school grounds was really made by a dinosaur, they''ll stop teasing her and her friends -- forever!
Always ready to take on a case, Nancy agrees, though she thinks the boys are wrong. Dinosaurs never roamed River Heights -- or did they? But then she gets a mean note: "Don''t go where you don''t belong!" When Nancy finds huge footprints in her own backyard, she''s hunting everywhere for answers. It''s a monster of a mystery, and she doesn''t have a zillion years to solve it!