| # | Book Title | Author | |
|---|---|---|---|
| 1 | Case of the Lost Boy, The | Butler, Dori Hillestad | |
| 2 | Case of the Mixed-Up Mutts, The | Butler, Dori Hillestad | |
| 3 | Case of the Missing Family, The | Butler, Dori Hillestad | |
| 4 | Case of the Fire Alarm, The | Butler, Dori Hillestad | |
| 5 | Case of the Library Monster, The | Butler, Dori Hillestad | |
| 6 | Case of the School Ghost, The | Butler, Dori Hillestad | |
| 7 | Case of the P-O-U-N-D Pet, The | Butler, Dori Hillestad |