Spook trains in the middle of the night! And they seem to vanish into thin air - but where do they go? The Famous Five are on to it. But the discovery of an unusual underground tunnel system, and a train-service, has them puzzled. If they follow the tracks, will they solve the mystery?

Dick is puzzled when he's woken by a light flashing through his window. Is someone trying to send him a coded message? And when the Famous Five hear of an escaped convict in the area, they are on red alert. The police won't help, so the Five have no choice but to solve the mystery alone.

Camping again! This time the Five have pitched their tent near an old ruined cottage, which looks as though it's been abandoned for years. When Anne hears strange noises at night the others don't believe her ... until they see ghostly lights. Could the cottage be haunted?

Can there still be smugglers at Smuggler's Top? The Famous Five go to stay at the large old house, and discover lots of brilliant hiding places, even underground tunnels! Then they catch people signalling out to sea - who are they?

Spook trains in the middle of the night! And they seem to vanish into thin air - but where do they go? The Famous Five are on to it. But the discovery of an unusual underground tunnel system, and a train-service, has them puzzled. If they follow the tracks, will they solve the mystery?

Can there still be smugglers at Smuggler's Top? The Famous Five go to stay at the large old house, and discover lots of brilliant hiding places, even underground tunnels! Then they catch people signalling out to sea - who are they?

There's a thief at Kirrin Cottage! The Famous Five think they know who it is, but they need to prove it! Where can they find evidence? The discovery of an old map and very unusual hiding place is all they need to get to the bottom of this mystery and uncover the true culprit!

Hurrah! It's holiday time, and the Famous Five are spending it at Billycock Hill. Most exciting of all, they've made a new friend - a real pilot! But when he disappears with top secret equipment, the Five are puzzled. Could their new friend be a spy?

There is a ruined castle on Finniston Farm, but only the dungeons remain and no one knows where they are! The Famous Five are determined to find them, and whatever else is hidden inside, but someone else wants to find out too. Can the Five get there first?

What is Uncle Quentin up to, all alone on Kirrin Island? He won't let anyone visit, not even George and the rest of the Famous Five. But Uncle Quentin isn't really alone on the island - someone is watching his every move.

There's a shipwreck off Kirrin Island, but where's the treasure? The Five are on the trail, looking for clues ... but they're not alone and time is running out.

Mystery Moor is aptly named, as the Five discover! There's something dangerous out there, but gang need help to find out what it is. The travellers camped on the moor are unfriendly, so the Famous Five have no other choice but to risk the treacherous mists and follow the trail.

There's a shipwreck off Kirrin Island, but where's the treasure? The Five are on the trail, looking for clues ... but they're not alone and time is running out.