When the anthropologists arrive, so the saying goes, the gods depart. Science, in explaining myths, strips away magic. There are places, though, with more resistance than others, places where the magic can still be felt. Among them are the west coasts of Ireland and Scotland, which Philip Marsden explores from the sea in his marvellous new book, The Summer Isles (Granta). I’ve reviewed it for The Daily Telegraph, but the review has yet to appear. Here’s the author, in a lovely film made by Colin Midson, explaining what the book’s about…