| # | Book Title | Author | |
|---|---|---|---|
| 1 | Mandie and the Secret Tunnel | Leppard, Lois Gladys | |
| 2 | Mandie and the Cherokee Legend | Leppard, Lois Gladys | |
| 3 | Mandie and the Ghost Bandits | Leppard, Lois Gladys | |
| 4 | Mandie and the Forbidden Attic | Leppard, Lois Gladys | |
| 5 | Mandie and the Trunk's Secret | Leppard, Lois Gladys | |
| 6 | Mandie and the Medicine Man | Leppard, Lois Gladys | |
| 7 | Mandie and the Charleston Phantom | Leppard, Lois Gladys | |
| 8 | Mandie and the Abandoned Mine | Leppard, Lois Gladys | |
| 9 | Mandie and the Hidden Treasure | Leppard, Lois Gladys | |
| 10 | Mandie and the Mysterious Bells | Leppard, Lois Gladys | |
| 11 | Mandie and the Holiday Surprise | Leppard, Lois Gladys | |
| 12 | Mandie and the Washington Nightmare | Leppard, Lois Gladys | |
| 13 | Mandie and the Midnight Journey | Leppard, Lois Gladys | |
| 14 | Mandie and the Shipboard Mystery | Leppard, Lois Gladys | |
| 15 | Mandie and the Foreign Spies | Leppard, Lois Gladys | |
| 16 | Mandie and the Silent Catacombs | Leppard, Lois Gladys | |
| 17 | Mandie and the Singing Chalet | Leppard, Lois Gladys | |
| 18 | Mandie and the Jumping Juniper | Leppard, Lois Gladys | |
| 19 | Mandie and the Mysterious Fisherman | Leppard, Lois Gladys | |
| 20 | Mandie and the Windmill's Message | Leppard, Lois Gladys | |
| 21 | Mandie and the Fiery Rescue | Leppard, Lois Gladys | |
| 22 | Mandie and the Angel's Secret | Leppard, Lois Gladys | |
| 23 | Mandie and the Dangerous Imposters | Leppard, Lois Gladys | |
| 24 | Mandie and the Invisible Troublemaker | Leppard, Lois Gladys | |
| 25 | Mandie and Her Missing Kin | Leppard, Lois Gladys | |
| 26 | Mandie and the Schoolhouse's Secret | Leppard, Lois Gladys | |
| 27 | Mandie and the Courtroom Battle | Leppard, Lois Gladys | |
| 28 | Mandie and Jonathan's Predicament | Leppard, Lois Gladys | |
| 29 | Mandie and the Unwanted Gift | Leppard, Lois Gladys | |
| 30 | Mandie and the Long Goodbye | Leppard, Lois Gladys | |
| 31 | Mandie and the Buried Stranger | Leppard, Lois Gladys | |
| 32 | Mandie and the Seaside Rendezvous | Leppard, Lois Gladys | |
| 33 | Mandie and the Dark Alley | Leppard, Lois Gladys | |
| 34 | Mandie and the Tornado! | Leppard, Lois Gladys | |
| 35 | Mandie and the Quilt Mystery | Leppard, Lois Gladys | |
| 36 | Mandie and the New York Secret | Leppard, Lois Gladys | |
| 37 | Mandie and the Night Thief | Leppard, Lois Gladys | |
| 38 | Mandie and the Hidden Past | Leppard, Lois Gladys | |
| 39 | Mandie and the Missing Schoolmarm | Leppard, Lois Gladys | |
| 40 | Mandie and the Graduation Mystery | Leppard, Lois Gladys |