| # | Book Title | Author | |
|---|---|---|---|
| Mariella Mystery Investigates a Cupcake Conundrum | Pankhurst, Kate | ||
| Mariella Mystery Investigates a Kitty Calamity | Pankhurst, Kate | ||
| Mariella Mystery Investigates the Disappearance of Diana Dumpling | Pankhurst, Kate | ||
| Mariella Mystery Investigates the Ghostly Guinea Pig | Pankhurst, Kate | ||
| Mariella Mystery Investigates the Huge Hair Scare | Pankhurst, Kate | ||
| Mariella Mystery Investigates the Mystery of the Cursed Poodle | Pankhurst, Kate | ||
| Mariella Mystery Investigates the Mystic Mustache | Pankhurst, Kate | ||
| Mariella Mystery Investigates the Spaghetti Yeti | Pankhurst, Kate |