“There is also one thing that troubles me. About halfway into the book, there is a reference to the World Trade Centre and the twin towers. Given that this book was written at some point in the last 18 months and it is not set in the past, why was that left in? It’s a small point, but I wonder how many readers will come to that point and flinch.”

It is stated many times in the book that the Olympians have been on Earth for a decade (ten years). That takes us back to either the late twentieth century, or the year 2000, in which case they would have stopped any threat from ever posing the Trade Centres in 2001.