The Lost Book of Undersea Adventure

Winner of the Children's Travel Book of the Year 2026 - Edward Stanford Travel Writing Award

'A clarion call to the child explorer [...] a spectacular immersion in the life of the wild.' - The Guardian

'Breathtakingly beautiful... every young adventurer should read this book.' - Kate Winslet

'Packed full of adventures' - Bear Grylls

Join the Unknown Adventurer on his latest adventure, this time entering dangerous waters after being washed up on a deserted island.

'This was meant to be a journal of my quest to find the sea nomads, but a few days ago something happened that turned my world upside down . . . You are about to read an adventure story so real you'll be able to taste the salt water on your lips.'

After he's flung from a ferry after seeing something so dangerous he would be killed for his silence, the Unknown Adventurer washes up on a deserted island. Completely alone, he puts his survival skills to the test and begins the journal he promised his younger siblings he would write.

But after a while he notices that it is not all what it seems on the island and something mysterious lies across the lagoon. Something he must investigate . . .

Presented like an artist's journal, with handwritten sections, smudged notes and stuck-in pages and illustrated in breathtaking detail, this is a thrilling tale of survival, friendship and underwater discovery.

Take a deep breath. You are about to enter dangerous waters.

Also from the Unknown Adventurer: The Lost Book of Adventure and Journey to the Last River.