I haven't read it yet, but George Leef makes it sound very worthwhile:
In early America, people spoke about liberty a great deal. Patrick Henry famously declared, “Give me liberty or give me death.” The preamble to the Constitution speaks to the importance of securing “the blessings of liberty.”
These days, however, we hear or read the word much less often. It doesn’t seem to be in President Obama’s vocabulary at all. He has declared that inequality is the greatest problem we face, but can anyone remember his ever talking about the importance of liberty?
One of them is Tom Palmer of the Atlas Economic Research Foundation. Palmer has written and edited quite a few books, most recently Why Liberty: Your Life, Your Choices, Your Future.
George Will comments on another, related books that sounds worth reading: "Progressives are wrong about the essence of the Constitution".
And a current application of the argument: "In D.C., Republicans are the enablers, Democrats the mandators". (See also "Cataloging Washington’s Hidden Costs: Part 1: The Loss of Liberty".)