An all-new collection of short stories from the world of Magnus Chase. With an exclusive fold-out illustration of the world tree!

Travel the Nine Worlds with your favourite characters from the world of Magnus Chase in a brand-new series of adventures.

Find out why Amir Fadlan hates clothes shopping in Midgard, see how Mallory Keen learns in icy Niflheim that insulting a dragon can be a good idea, and join Alex Fierro as they play with fire (and a disco sword) in the home of the fire giants, Muspellheim.

But watch out for Thor, who is jogging through all Nine Worlds so he can log his million steps - and is raising quite a stink . . .

Rick Riordan, dubbed 'storyteller of the gods' by Publishers Weekly, is the author of five New York Times number-one bestselling book series with millions of copies sold throughout the world: Percy Jackson, the Heroes of Olympus and the Trials of Apollo, based on Greek and Roman mythology; the Kane Chronicles, based on Egyptian mythology; and Magnus Chase, based on Norse mythology. Percy Jackson and the Lightning Thief, Rick's first novel featuring the heroic young demigod, won the Red House Children's Book Award and is now a blockbuster film franchise starring Logan Lerman.

To learn more about Rick and his books, you can visit him at www.rickriordan.co.uk or follow him on Twitter @camphalfblood.