A slim paperback caught Becky Brown’s eye as she scanned the bookshelves of an Oxfam charity shop. The cover showed a man’s silhouette with the title They in capitals.
Brown, a literary agent who was looking for something to read while staying with her parents in Bath, had never heard of the book, but its author, Kay Dick, was vaguely familiar. Intrigued, she bought it for 60 cents.