The Mystery of the Shrinking House — William Arden

Worthless old junk -- but it belonded to the Countess's dead brother, and she wants it all back!

Unfortunately everything has been sold -- the old leather suitcases, the stuffed owl, even the strange paintings showing a house getting smaller and smaller. So the Countess hires The Three Investigators to track down her brother's belongings.

The boys never dream that the “junk” might be valuable. But they soon discover that someone else is desperate to find the dead man's things -- and will stop at nothing to get them!