Author Rick Riordan discusses his future novel plans at a promotional talk for his latest novel 'The Mark of Athena' from his 'Heroes of Olympus' series at Temple Judea in Miami.
'The thing I love about this book is that all seven demigods of the prophecy are finally all together aboard the Argo II', he said of his new book. 'There will be two more in the series; like 'Percy' ['Percy & The Olympians'], it's going to be a five book series.' He then confirms the rumours that his next set of stories will be based on Norse mythology but insists it's nothing to do with the 'Thor' films or comic books. 'It's really about going back to the very beginning. Norse is probably my favourite set of stories even more than the Greek, I love Norse mythology.'