Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | The Mystery of the Haunted Caves | 2001 | Penny Warner | Buy |
| 2 | The Mystery of the Missing Mustangs | 2001 | Penny Warner | Buy |
The Troop 13 Mysteries feature young adventurers tackling mysteries in outdoor settings. The Mystery of the Haunted Caves and The Mystery of the Missing Mustangs, both published in 2001, combine adventure with puzzle-solving in the tradition of classic children’s mystery series.
These books represent an early entry in Penny Warner’s children’s fiction catalog, predating the Code Busters Club by a decade and establishing her interest in writing mysteries for younger readers.