- The five o'clock ghost, by Dori Hillestad Butler ; illustrated by Aurore Damant
- The secret room, by Dori Hillestad Butler ; illustrated by Aurore Damant
- The final treasure, by Dori Hillestad Butler ; illustrated by Tim Budgen
- The hide-and-seek ghost, by Dori Hillestad Butler ; illustrated by Aurore Damant
- The ghosts at the movie theater, by Dori Hillestad Butler ; illustrated by Aurore Damant
- King & Kayla and the case of the lost tooth, written by Dori Hillestad Butler ; illustrated by Nancy Meyers
- King and Kayla and the case of the secret code, written by Dori Hillestad Butler ; illustrated by Nancy Meyers
- The ghost backstage, by Dori Hillestad Butler ; illustrated by Aurore Damant
- The underground ghosts, super special, by Dori Hillestad Butler ; illustrated by Aurore Damant
- King & Kayla and the case of the mysterious mouse, written by Dori Hillestad Butler ; illustrated by Nancy Meyers
- The ghost in the attic, by Dori Hillestad Butler ; illustrated by Aurore Damant
- Mr. Summerling's secret code, by Dori Hillestad Butler ; illustrated by Tim Budgen
- The haunted library, by Dori Hillestad Butler ; illustrated by Aurore Damant
- King & Kayla and the case of the missing dog treats, written by Dori Hillestad Butler ; illustrated by Nancy Meyers
- The ghost at the fire station, by Dori Hillestad Butler ; illustrated by Aurore Damant
- The ghost in the tree house, by Dori Hillestad Butler ; illustrated by Aurore Damant