March 1895. London suffocates in fog and apathy, until a baffling "locked-room" mystery awakens the matchless intellect of Sherlock Holmes. Sir Thomas Egerton, the pillar of British commerce in the Canary Islands, has been found dead at his estate in Santa Brígida with an inexplicable grimace of terror on his face, showing no signs of violence nor any trace of known poisons. Hired urgently by the shipping company, Holmes and his faithful chronicler, Dr. John H. Watson, travel to Gran Canaria. There they discover a paradise of contrasts where Victorian civilization coexists with the brute force of volcanoes and trade winds. What begins as the investigation of an exotic murder perpetrated with deadly local botany?the Isoplexis plant and dragon tree resin?soon uncovers an international conspiracy. The German Empire, under the orders of the aristocratic Baron Von Heeren and an enigmatic chemist known as the Alchemist, is weaponizing the island's ancient secrets, from the ancestral whistled language of the ravines to the use of the majestic Roque Nublo as a signal station to threaten the British fleet. From the dark tunnels beneath La Isleta and submarine skirmishes in Puerto de la Luz, to a life-or-death intellectual duel in the lantern room of the Maspalomas Lighthouse, Holmes must face the most advanced military science and a lethal betrayal lurking among his own countrymen. Presented as an unpublished manuscript by Dr. Watson, edited and compiled by M. M. Moses, Sherlock Holmes: Death in Gran Canaria is a masterful thriller that combines classic deduction with geopolitical espionage at the dawn of a new century of shadows.