name   The Leadership Challenge
author   J.M. Kouzes, B.Z. Posner
year   2008 (4th edition)
pages   416
One of the most inspiring works on transformational leadership, and also one which is well grounded in research. Kouzes and Posner have spent years collecting the data and interviewing a lot of people about their personal best stories. They adapt and interpret the material with amazing elegance. They communicate complicated things with simple implementation. That alone makes the book worth reading.