Could Ms. Flitt, the Sussex school librarian, be a witch? It is a possibility that Shirley must entertain as she investigates a series of ominous mishaps at Sussex Academy.

Barf, Stink's dog, is under suspicion when neighbourhood cats start disappearing. When he is nabbed by Hoskins, the over zealous local dogcatcher, his life hangs in the balance.

Shirley infiltrates an organized gang of kiddie thieves after her backpack is ""snatched"" by a six-year-old pickpocket.

Shirley and Bo join the circus as they try to find out who left a baby boy on Mr. Howie's doorstep in the middle of the night.

Shirley's attempts to uncover the truth about a mysterious new boarding student at Sussex Academy place the young stranger's life in danger.

There is trouble on the set of The Happy Valley Show: props are exploding, background walls are falling over and Freddie the Firefly recently blew his lightbulb.

Sitting on the toilet becomes unsafe at Sussex Academy when the kids discover there is a slithering creature living in the water system.

When Bo befriends ""the crazy old lady"" who lives down the block, he and Shirley find themselves being pursued by a criminal impostor as they race to find a bag of stolen diamonds.

When Robert Holmes is accused of stealing a top secret government decoding key from the British Consulate, Shirley jumps to her father's defense and vows to find the real offender.

An orienteering excursion into the deep woods brings to life a ghost story for the students of Sussex Academy.

When a disoriented stranger appears at the Holmes' front door with Joanna Holmes' stethoscope in his hand, Shirley is certain that the man has information on her missing mother's whereabouts.

Shirley suspects that Bo's cousin Zack, a musician, has something to do with the strange accidents that are taking other performers out of the picture and helping his career skyrocket!