A mysterious theft at the British Museum is followed by an unexpected death at an archaeology dig in Egypt.

Holmes and Watson follow clues that lead from London to the ancient deserts of Cairo. Exactly who are the Cult of the Free? And what connects them to each event? It falls upon Sherlock Holmes and his faithful friend, Dr Watson, to determine the motives. But it soon becomes apparent that the clues are almost as difficult to discover as the ancient tombs themselves…

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This book was inspired by Abbott's original short story, SHERLOCK HOLMES The Egyptian Ring. It was first published in Songs of the Osirian: Companion and was later included in the paperback edition of SHERLOCK HOLMES A Scandalous Affair.