10 books in series

The Boxcar Children Mysteries

The Boxcar Children Mysteries is a 10-book series with 10 released primary works first released in 1961 with contributions by Gertrude Chandler Warner and Robert Papp.

Blue Bay Mystery
Bicycle Mystery
The Mystery Cruise
The Mystery of the Lost Mine
The Mystery of the Secret Message
The Firehouse Mystery
The Mystery at the Alamo
The Mystery of the Empty Safe
The Mystery on Blizzard Mountain
The Giant Yo-Yo Mystery