I fully agree with this. I have three of Ernie J Zelinski's books and they are beauties.
To be honest, I think that his first, "The Joy of Not Working" is better but they all tell a similar story in a very entertaining fashion.
I first started looking at the possibility of an early retirement 12 years ago after reading "Your Money or Your Life" by Joe Dominguez and Vicki Robin. (Not to be confused with the book "Your Money and Your Life by David Koch. This is about understanding the relationship between money and your life's energy and just how much you may be expending your life's energy to keep your work life going and not the other way around. It motivated me so much I re-read it about 80 times. The investment advice in it is now dated but it is the principles in it that matter. There are a few other good books that I could recommend but I certainly agree with Chimo on Ernie's books.
Ernie J Zelinski's books are wonderful and can really remove lots of fears that people may have about retirement.