This is a great undergraduate text, which is why it is the best-selling textbook in project management. In addition, this text has without a doubt the best and most extensive exercises available for teaching AND learning network diagramming. There really is nothing like it on the market. It is not, however, a good graduate text, lacking adequate treatment of theory. In fact, it is books of this sort that give project management the reputation of being "a praxis, but not an academic discipline". PM is in fact both, and at the graduate level, a different text is needed.