| # | Book Title | Author | |
|---|---|---|---|
| 1 | Mystery on the Ice, The | Warner, Gertrude Chandler | |
| 2 | Mystery in Washington, D. C., The | Warner, Gertrude Chandler | |
| 3 | Mystery at Snowflake Inn, The | Warner, Gertrude Chandler | |
| 4 | Mystery at the Ballpark, The | Warner, Gertrude Chandler | |
| 5 | Pilgrim Village Mystery, The | Warner, Gertrude Chandler | |
| 6 | Mystery at the Fair, The | Warner, Gertrude Chandler | |
| 7 | Pet Shop Mystery, The | Warner, Gertrude Chandler | |
| 8 | Niagara Falls Mystery, The | Warner, Gertrude Chandler | |
| 9 | Mystery in the Old Attic, The | Warner, Gertrude Chandler | |
| 10 | Windy City Mystery, The | Warner, Gertrude Chandler | |
| 11 | Mystery of the Queen's Jewels, The | Warner, Gertrude Chandler | |
| 12 | Mystery of the Black Raven, The | Warner, Gertrude Chandler | |
| 13 | Mystery in New York, The | Warner, Gertrude Chandler | |
| 14 | Home Run Mystery, The | Warner, Gertrude Chandler | |
| 15 | Honeybee Mystery, The | Warner, Gertrude Chandler | |
| 16 | Mystery of the Screech Owl, The | Warner, Gertrude Chandler | |
| 17 | Mystery of the Tiger's Eye, The | Warner, Gertrude Chandler | |
| 18 | Candy Factory Mystery, The | Warner, Gertrude Chandler | |
| 19 | Mystery of Alligator Swamp, The | Warner, Gertrude Chandler | |
| 20 | Great Shark Mystery, The | Warner, Gertrude Chandler | |
| 21 | Black Widow Spider Mystery, The | Warner, Gertrude Chandler |