The Disappearing Floor

Once again Frank and Joe Hardy take on a puzzling case when their famous detective father asks the boys to assist him in tracking down a notorious jewel thief and his accomplices. The trail leads to the outskirts of the Hardys' home town and to a weirdly guarded mansion on the old Perth estate. With their pal Chet Morton, the brothers must tackle the mystery of the mansion heir's sudden death. A disappearing floor, a huge, savage-looking, hound, a galloping ghost, and a college professor's startling invention are just a few of the strange elements that complicate the boys' efforts to solve both mysteries.

Binding Type: Hardcover
Publisher: Grosset & Dunlap
Published: 05/01/1940
ISBN: 9780448089195
Pages: 192
Weight: 0.54lbs
Size: 7.96h x 5.02w x 0.73d
Accelerated Reader Quiz #/Name: 5658 / Disappearing Floor
Reading Level: 5.6 / Interest Level: Middle Grade / Point Value: 5