A Knife in the Fog (2018) by Bradley HarperNot long after the publication of A Study in Scarlet, Arthur Conan Doyle (not yet Sir), receives a message from former Prime Minister William Gladstone's secretary, Jonathan Wilkins, urgently asking him to come to come to London--"as many lives may lie upon its balance." Assuming that the summons is medical (though a bit mystified why Gladstone would call upon him), Doyle arranges to go. Only to find out that Gladstone wants him to work with the poli...
