num_pages: 149
description: A Simon &amp; Schuster eBook. Simon &amp; Schuster has a great book for every reader.
language: English
title: The Secret of Sigma Seven
titlecomplete: The Secret of Sigma Seven (Hardy Boys, #110)
genres: Fiction, Mystery, Collections, Young Adult, Classics, Childrens
ratings_count: 151
series: The Hardy Boys
publisher: Wanderer Books