WHICH ISLAND?

To celebrate the launch of my next book, Body on the Island which is released on 23rd February, I’m running a competition. The first to guess the island in my book will win a signed copy of book 1 and book 2.
Island’s are fascinating, with their natural isolation and that sense of abandonment. They’re also perfect elusive settings for many books. Today’s island is Mont. Saint-Michel and is the base for Angela Carter’s magnificent story The Bloody Chamber. A fabulously gothic re-imagining of a European fairy tale, this story has a murderous marquis taking his new wife to the island where the causeway floods, leaving the castle inaccessible. There are his previous dead wives in a room she should not enter; iron maidens; and a blind piano tuner. The island quickly becomes a frightening, beautiful prison. ‘That lovely, sad, sea siren of a place!’ I won’t spoil it and tell you her fate.
Sadly, this magnificent island is not the island in my book. But which is? All the clues are in the book. Good luck!
I’ll take a guess. Um, how about Eilean Mor?
Ah, sadly not. But a good guess.