Mystery in Austria takes place in a gasthaus on the Yugoslavian border near some old Roman ruins. The plot's not much newer but engaging in it with youthful enterprise are Robin and Dave, staying there, after Dave discovers that an English boy who had presumably fallen into a gorge is still alive (and his father kidnapped). Along with a few gemutlich tourist attractions (Innsbruck, etc.) this settles down to the children's discovery of a secret tunnel and a gold-struggling operation. Nondescripted to non-readers of anything better.