Helping their private-investigator dad find the culprit who has stolen art from the Redoaks Museum, Sean and Brian Quinn end up in the Egyptian room, where a statue of Anubis is rumored to take midnight strolls

Vacationing at a dude ranch, Sean and Brian Quinn collect evidence that Nightstar, a valuable race-horse, has been stolen and is being held in a haunted abandoned mine

Brian and Sean investigate a series of suspicious accidents at a theater waiting to be torn down.

On a visit to Piney Point Manor, an elegant seaside resort, Sean and Brian Quinn investigate a series of thefts that have baffled local police, and someone tries to frighten the brothers off

Charles Collier approaches the Casebusters for help when his new house begins making strange noises and seems to be watching him

When the people of Redoaks open the town's time capsule, buried in 1918, they find that the contents are missing, and Sean and Brian try to discover who removed them and why

When a spoiled kid disappears, the Casebusters go spelunking with a pirate’s ghostSean and Brian Quinn have never liked Lester Hopper. The seven-year-old is spoiled rotten, and looks down on every kid he knows—even the ones who are taller than him! But one night, Lester disappears and a ransom note warns the Hoppers not to contact the police. The Casebusters are going to need to solve their most serious mystery yet—a possible kidnapping. Before he disappeared, Lester was diagnosed with a lung infection, and he needs to take his medicine again soon or he’ll get very sick indeed. But was Lester kidnapped, or did he run away? Whatever the answer, all the clues point to one the town’s oldest cave, which is said to be haunted by the ghost of a dead pirate. To save Lester, Brian and Sean will have to match wits with a swashbuckler who’s been dead for centuries.

When Sean and Brian stay with their friend Alan and his family in the wooded area of Grizzly Hill for the weekend, they are told to stay out of the woods, but their curiosity leads them to the edges of the woods where they see glowing eyes and clawed footprints. Original.

Working as a standin in a movie being shot in Redoaks, Sean Quinn learns that the cast and crew think the set is jinxed, but he is determined to find out who is behind the apparent accidents

When an Internet prank turns serious, Sean becomes the main suspect Bored in computer class, Sean Quinn and his friend Matt decide to liven things up with a little computer prank. But the laughs stop quickly when they accidentally hurt a younger student’s feelings, earning themselves a quick trip to the principal’s office. That night, Sean receives an anonymous email praising him for the prank, and promising to avenge his punishment by causing trouble at the school. The next day, a virus wreaks havoc with the school computers, and the principal suspects Sean of being the mastermind! To keep himself out of trouble, Sean asks his brother Brian to help him find the hacker behind the anonymous email. Catching criminals in the real world is tough enough, but when a crook decides to hide behind the computer screen, it will take every trick in the Casebusters’ arsenal to bring this cyber-thug to real-world justice.