The Castle Mystery By Gertrude Chandler Warner

"The Castle Mystery (Boxcar Children #36)" by Gertrude Chandler Warner

"The Radio Mystery (Boxcar Children #97)" by Gertrude Chandler Warner

"The Deserted Library Mystery (Boxcar Children #21)" by Gertrude Chandler Warner

The Boxcar Children book 9 Mountain Top Mystery by Gertrude Chandler Warner

"The Midnight Mystery (Boxcar Children #95)" by Gertrude Chandler Warner

The Lighthouse Mystery (The Boxcar Children) by Gertrude Chandler Warner

"The Mystery of the Runaway Ghost (Boxcar Children #98)" by Gertrude Chandler Warner

"The Haunted Cabin Mystery (Boxcar Children #20)" by Gertrude Chandler Warner

"The Legend of the Irish Castle (Boxcar Children #142)" by Gertrude Chandler Warner

"The Animal Shelter Mystery (Boxcar Children #22)" by Gertrude Chandler Warner

The Boxcar Children #8 The Lighthouse Mystery

"The Mystery in the Cave (Boxcar Children #50)" by Gertrude Chandler Warner

Gertrude Chandler Warner

Amber-Lyn Bigelow

"The Outer Space Mystery (Boxcar Children #59)" by Gertrude Chandler Warner

[BookQuester] 'The BoxCar Children 5 - MIKE'S MYSTERY' by Gertrude Chandler Warner

"The Canoe Trip Mystery (Boxcar Children #40) by Gertrude Chandler Warner

"The Finders Keepers Mystery (Boxcar Children #99)" by Gertrude Chandler Warner

[BookQuester] 'The BoxCar Children 4 - MYSTERY RANCH' by Gertrude Chandler Warner

"The Hockey Mystery (Boxcar Children #80)" by Gertrude Chandler Warner

"The Election Day Dilemma (Boxcar Children #145)" by Gertrude Chandler Warner