Mystery of Cabin Island version 2
Author: first_name: Franklin W.
last_name: Dixon
Language: English
Year: 1929

The Hardy Boys find a trespasser on an island belonging to Elroy Jefferson, whose stolen car they helped recover in a previous adventure. They discover that the trespasser is searching for a stolen stamp collection of great value on Jefferson's island. They thwart the intruder and return the collection to its rightful owner.
 summary by the reader