The first three books form a trilogy: "Prodigal Son", co-written with Kevin J. Anderson, was published in 2004; "City of Night", co-written with Ed Gorman, was published in 2005; and "Dead and Alive", written without a co-writer, was released on July 28, 2009. (At the same time that the final novel's authorship was confirmed, having previously been slated as "by Dean Koontz & Ed Gorman", Koontz's 'collaborators' on the earlier novels were retrospectively removed as co-authors, and all new editions of the novels are credited as "by Dean Koontz" alone.)