Mysteries come in all sorts, and this collection of seven short stories reflects that, from hidden temples beneath the sea, to worlds discovered through a microscope. Murderers, ghosts and demons can also be found in this collection. The stories included are: "The Temple", "To Prove an Alibi", "The Diamond Lens", "The Adventure of the Red Circle", "An Episode in a Lodging House", "How Siva Spoke", and "The Nail."