Anthony Horowitz’s novel Necropolis captivates mostly young adults. Necropolis is the fourth book of The Gatekeepers series. Necropolis is told in third person. Part of the story was set in the UK but mainly was in Hong Kong. The story is about a 15 years old named Scarlet. She always knew she was different but what Scarlet doesn't knows is she is the 5th and last Gatekeeper. The Gatekeepers consist of five modern day teenage kids with special powers, destined to defeat The Old ones and save the world. The four other gatekeepers have already been found and now it's their turn to find Scarlet and tell her the truth before The Old ones gets their hands on her. Without Scarlet, the Gatekeepers can not defeat The Old Ones. The strength of Horowitz