Neil Gaiman's a Study in Emerald by Neil Gaiman

Neil Gaiman's A Study in Emerald : Hardback : Dark Horse Books : 9781506703930 : 1506703933 : 10 Jul 2018 : "This supernatural mystery set in the world of Sherlock Holmes and Lovecraft's Cthulhu Mythos features a brilliant detective and his partner as they try to solve a horrific murder. The complex investigation takes the Baker Street investigators from the slums of Whitechapel all the way to the Queen's Palace as they attempt to find the answers to this bizarre murder of cosmic horror"--