This book analyses the most sung contemporary congregational songs (CCS) as a global music genre. Utilising a three-part music semiology, this research engages with producers, musical texts, and audiences/congregations to better understand contemporary worship for the modern church and individual Christians.  Christian Copyright Licensing International data plays a key role in identifying the most sung CCS, while YouTube mediations of these songs and their associated data provide the primary texts for analysis.  Producers and the production milieu are explored through interviews with some of the highest profile worship leaders/songwriters including Ben Fielding, Darlene Zschech, Matt Redman, and Tim Hughes, as well as other music industry veterans.  Finally, National Church Life Survey data and a specialized survey provide insight into individual Christians’ engagement with CCS. Daniel Thornton shows how these perspectives taken together provide uniqueinsight into the current global CCS genre, and into its possible futures.