1937: Hitler sent an expedition to Tibet in search of the lost land of Thule. 1941: Himmler spent a huge fortune, and sacrificed the lives of hundreds to turn Wewelsburg Castle in Germany into a shrine to the SS. 2008: Art recovery expert Jamie Saintclair is astonished to discover that the gentle grandfather he thought he knew was a decorated war hero, serving in the Special Air Service in World War Two. And his grandfather has one more surprise. Sewn into the endpaper of his journal is a strange piece of Nazi symbolism. With this discovery, Jamie is launched on a breathless chase across Europe and deep into Germany's dark past. . .