Philip Purser-Hallard is the author of the trilogy of urban fantasy thrillers beginning with The Pendragon Protocol, and the editor of a series of anthologies about the City of the Saved. As well as writing various other books and short stories, Phil edits The Black Archive, a series of monographs about individual Doctor Who stories published by Obverse Books.

"Displays the author's remarkable facility at conjuring the spirit of Conan Doyle's originals. Sherlockians and Wildeans alike will embrace Purser-Hallard." Publishers Weekly starred reviewPraise for the author: "A very good locked-room puzzle" Morning Star"One of the cleverest locked room mysteries ever tackled by Sherlock Holmes... John Dickson Carr and Anthony Boucher fans will be gratified at the logical explanation the master rationalist devises. This ranks among the top novel-length Sherlock Holmes pastiches." Publishers Weekly"The best kept secret in British genre writing"the British Fantasy Society"[Purser-Hallard's] writing is crisp and clever... the cast of characters appealing, interesting and consistent"the British Fantasy Society on The Pendragon Protocol