Raven's Gate

Raven's Gate is the first book in The Power of Five series, written by Anthony Horowitz. It was published and released in the United Kingdom on 1 August 2005, by Walker Books Ltd and in the United States (1 June 2005) by Scholastic Press under the adjusted series title The Gatekeepers. It is followed by Evil Star, released in 2006, Nightrise in 2007, and Necropolis in 2008, with the final book Oblivion in 2012.