The Adventurous Four Again: Stranded!
Enid Blyton
Four children set off on a short trip to Smuggler’s Lock and find a mysterious stranger there. When he discovers them following him, he takes away their boat and maroons them on the rock. There’s no chance of escape without a boat, and its completely disappeared – what are the children going to do?
Reviews

There were four children who found some baddies and they caught them.
Queen Tuesday Rollercoaster 21.12.2020

Andy was very clever and useful. You should read this!
Baroness Panther Rollercoaster 21.08.2020

Full of danger, excitement and laughter
Queen Blueberry Borneo 21.07.2020