The River of Adventure

The Sea of Adventure

The Mountain of Adventure

The Ship of Adventure

The Circus of Adventure

The Castle of Adventure

The Island of Adventure

The Mystery of the Strange Bundle: Book 10

The Mystery of the Hidden House: Book 6

The Mystery of the Pantomime Cat: Book 7

Five Go To Billycock Hill: Book 16

The Mystery of the Invisible Thief: Book 8

The Mystery of the Missing Man: Book 13

The Mystery of the Missing Necklace: Book 5

Five Are Together Again: Book 21

Five Go To Mystery Moor: Book 13

Five Go To Smuggler's Top: Book 4

The Mystery of the Strange Messages: Book 14

Five On Finniston Farm: Book 18