num_pages: 192
description: 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.
language: English
title: The Disappearing Floor
titlecomplete: The Disappearing Floor (The Hardy Boys, #19)
genres: Detective, Childrens, Crime, Young Adult, Juvenile, Classics, Mystery, Mystery Thriller, Adventure, Fiction
ratings_count: 3458
series: The Hardy Boys
publisher: Grosset & Dunlap