Reddit mentions of On Revolution (Penguin Classics)

One of the best theoretical works I can think of is Hannah Arendt's On Revolution (amazon). She discusses the difference between American and French revolutions, and bases the failure (and ensuing terror) of the French on the attachment to economic principles (their aim being to get rid of poverty, instead of instituting freedom).

Incidentally, a close reading of Marx would get you to the same direction. Have a look here, which is one of my favourite early texts by Marx.

You could also pick up any work of Amartya Sen, who though an economist places economics as secondary to freedom. He developed something called capabilities-approach together with Martha Nussbaum (SEP).

That should be enough to start with, and relatively diverse too. I'd suggest starting with online articles, Arendt's book is very interesting and an easy page turner.

Note that none of these completely disregard economics, they only say it's secondary (and Arendt also says it's not part of politics, it's something foreign to politics, though perhaps a stable economy would be a prerequisite for politics). They are not libertarians.