Project Management: A Systems Approach to Planning, Scheduling and Controlling is a project management bible written by Dr. Harold Kerzner, one of the most respected experts on Project Management. Now in its 10th edition (2015) it offers an extremely comprehensive knowledge of project management.
There have been many mixed reviews and opinions about this book. Some people have felt it is too long, too intimidating and does not contain enough case studies. At a whopping 1200 pages, it is indeed long, but its length ensures that is offers an exhaustive, encyclopaedic type of coverage.