From Asgard to Valhalla: The Remarkable History of the Norse Myths

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 gods themselves - is at hand. It is from this tree that Odin, father of the gods, hanged himself...