**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.