When the famous whistling caves fall silent and treasure goes missing from the castle on the cliffs, Scott, Jack, Emily and Drift the dog try to solve the mystery.

Scott, Jack and Emily hear that a film is being made at the nearby manor house so they go to watch. When the glamorous star of the film vanishes the friends try to solve the mystery. Has the star been kidnapped by a crazed fan? Or did she venture into the manor's attic at midnight and fall foul to the ghost that haunts the house?

When thieves raid the house of a neighbour, Emily, Jack and Scott are ready to investigate. But, strangely, the neighbour doesn't seem to want the thieves to be caught The burglars didn't escape with much this time but could the raid be connected to a much older crime involving millions of pounds?

The circus comes to town, full of conjurors, clowns, tightrope walkers and trapeze artists. But dark secrets lurk beneath the sawdust and spangles - secrets that are part of a dangerous mystery that might prove impossible to solve.

Strange crimes are being committed in Castle Key - by a skeleton Everyone is baffled. Scott, Jack, Emily and Drift the dog try to solve the mystery.

Action and adventure as Jack, Scott, Emily and Drift the dog uncover a monster mystery surrounding a dinosaur skeleton in the seventh in the Adventure Island series.

There's a new resident in Castle Key - and somebody is watching him Scott, Jack, Emily and Drift soon suspect that the new resident is an enemy spy. It explains the bullet-proof glass in the windows of his house. And the MI5 agent who is clearly keeping tabs on him But what is an enemy spy doing in Castle Key?

When a young prince is kidnapped while on a school camping trip in Castle Key, Scott, Jack, Emily and Drift are eager to take on the case. Drift's clever nose is sure to sniff out some clues to the kidnappers - but can the friends rescue the hostage in time?

When Boomerang the cat disappears into a tiny gap behind the fireplace at Stone Cottage, Scott, Jack and Emily are amazed to discover a secret room that Aunt Kate never knew existed! But what was the room created for? Inside is very little other than an enormous old chest which Jack is convinced must be full of treasure, but what secrets will be revealed when the friends finally manage to open the box?

Something strange is afoot on the moors above Castle Key - sinister noises, lights in the sky and mysterious figures moving in the dark. Are aliens invading, as Jack suspects? Could it be smugglers, as Emily thinks? Or is there another explanation? Scott, Jack, Emily and Drift the dog are on the case!