I had read Covey's most famous book, "The Seven Habits of Highly Effective People" a couple of years ago, and found it to be a very useful and impressive work. "Principle-centred Leadership" is a very poor-quality, disorganized rehash of the same material. One might get something out of it if one hadn't already read "The Seven Habits", but in that case I would recommend going straight to the original work. A thoroughly disappointing experience, which has lessened my respect for Covey somewhat.