This thesis investigates the number of individuals involved in the making of the Book of Kells. It demonstrates that only two individuals, identified as the Scribe-Artist and the Master-Artist, were involved in its creation. It also demonstrates that the script is the work of a single individual - the Scribe-Artist. More specific questions are answered regarding the working relationships between the book’s creators and the sequence of production. This thesis also demonstrates that the manuscript was created over two separate campaigns of work. The comprehensive nature of this study focuses on all aspects of the manuscript including, script, initials, display-lettering, decoration and illumination.