num_pages: 48
description: Invisible Inc., the mystery-solving trio with an invisible friend, is back on the case. They must help Justin find his missing karate belt--he can't do anything right in karate class without it.
language: English
title: The Karate Class Mystery
titlecomplete: The Karate Class Mystery (Invisible Inc., #5)
genres: Childrens, Mystery
ratings_count: 39
series: Invisible Inc., Hello Reader Level 4
publisher: Cartwheel