This study investigates differences among means of 110 randomly selected popular press business books (b-books) from a population of 1,200, written by multiple authors, mixed-gender coauthors, male vis-à-vis female authors, and b-books published between 1954 and 2006. Leadership and change were the two dependent variables measured by examining the depth of each in the index of each b-book. Five null-hypotheses were tested, with a .05 level of confidence. None of the means tested differed statistically. Furthermore, there was enough consistency in the advice b-book authors gave to their readers that it emerged as a theme: leaders are the catalysts of organizational change. The "Leadership Change Model" demonstrates this theme.