 The core of the music for the album had already been recorded at the time of his death, with all of Raven's contributions already recorded, and four songs had also been completed with vocals by Kory Clarke at the time of Raven's death.The completion and subsequent commercial release of "Holy City Zoo" was delayed considerably as the remaining band members came to terms with Paul Raven's death and Clarke attempted to complete the remaining songs for the unreleased album.Work was completed in 2008 and the album was partly mixed by noted producer Tim Palmer and released in June 2009 on Echozone / Sony Music in Europe.