Mark Gatiss 
Sherlock: A Study In Pink #5 
A Study in Pink #5

A drugs bust at 221B Baker Street leads to a revelation regarding the victim’s phone… but when Sherlock gets a call – and a ride! – it’s from the last person he suspected!

With the serial killer revealed, Sherlock faces his most taxing criminal investigation yet. Can a man really talk his victims to death? Is Sherlock strong enough to prevail in the face of blind chance? There’s only one way to find out!