This is a chunky management book of over 400 pages written by two headhunters from Spencer Stuart. They both specialise in finding chief executives, and have used their interviewing and analytical skills to identify why some individuals are good at running companies.
They talked to 50 top American bosses and the results are in Lessons from the Top. Both authors used to be management consultants, but the interviews are not critical or negative - they are essentially little hagiographies.
This is, I suppose, only to be expected.