When someone slips into the precinct and steals Mama Pigeon's tarts, pigeon detectives Martin P. Sweets, Felix Danish, and Ralph Custard follow the clues to find out who stole the delicious treats.

Jared and his mother drive a girl home, only to discover that she and her mother are ghosts, and they want nothing to do with the living. Jared puts clues together to discover how she died and wants to help her reach a restful place.

Nine-year-old Shelby Holmes and eleven-year-old John Watson team up again, this time to investigate the new science teacher at the Harlem Academy of the Arts.

When Pedro's favorite stuffie, Milo the Moose, goes missing at the fair, Katie and Pedro retrace their steps in order to solve the mystery.

Jillian thinks there's a ghost in her basement. King and Kayla know that ghosts aren't real, but what is making that dark shape and that scary noise? King and Kayla are going to a sleepover at Thor and Jillian's house. King LOVES sleepovers. They're his favorite thing! And he particularly likes Jillian's basement, because animals are allowed on the furniture. But Jillian and Thor are afraid to go downstairs because there's big, dark blob that goes...

Someone is vandalizing everything and they must be stopped.