'I think I’ve written more Sherlock Holmes than even Conan Doyle': the ongoing fight to reimagine Holmes

A century on, why does Sherlock endure? Even today, Sherlock Holmes' adventures continue to be endlessly rewritten. However, how new writers portray him remains contested, with some of them running "into quicksand when reimagining the beloved detective." Alison Flood, from the Guardian, investigates.