Where The World Ends - Geraldine Mccaughrean, Usborne Publishing

In the summer of 1727, a group of men and boys are put ashore on a remote sea stac to harvest birds for food. No one returns to collect them. Why? Surely nothing but the end of the world can explain why they have been abandoned to endure storms, starvation and terror. And how can they survive, housed in stone and imprisoned on every side by the ocean?