num_pages: 64
description: When Cam's grandparents are robbed on their way to her parents' surprise birthday party, Cam uses her photographic memory to solve the mystery, in the twentieth addition to this popular mystery series. Reprint.
language: English
title: Cam Jansen and the Birthday Mystery
titlecomplete: Cam Jansen and the Birthday Mystery (#20)
characters: Cam Jansen
genres: Mystery, 1st Grade, 2nd Grade, Childrens, Chapter Books, Picture Books, Middle Grade
ratings_count: 599
places: The United States of America
series: Cam Jansen Mysteries
publisher: Puffin