In order of relevance to your request:
What It Means To Be an Anarcho-Capitalist
How I Became A Libertarian (from I Chose Liberty: Autobiographies of Contemporary Libertarians)
…all mentioned in this excellent interview (which I highly recommend)
For a a greater extrapolation, see here. (In particular, the Law and Economics lecture from 2009, and the resources on ownership, which are linked in that post as well.) However, you might still start with “What libertarianism is”, as it’s probably the best overall primer I’ve ever read.