From Asgard to Valhalla

Whether they focus on Thor''s powerful hammer, the wailing Valkyrie, the palatial home of the gods - Asgard - or ravenous wolves and fierce elemental giants, the Norse myths are packed with rowdy incident. But at the centre of their cosmos stands a gnarled old ash tree, Yggdrasil, from which all distances and times are measured. When the old tree creaks, Ragnarok - the end of the world and of the...