One book that helped me was John Hosper's Libertarianism . I wish I could go into all the arguments he gives. It is clearly written and touches on so many topics in this debate. Skip the chapters on national defense. That's where Satan gets them.
Some books have lists of books.
David Bergland has a list in his book Libertarianism in One Lesson . The longest running libertarian magazine is Reason . I wish I could introduce you to more authors, but this book is just introductory thoughts. Richard Lewis, the editor of the UNews, wrote an article once praising a book, The Economy in Mind by Warren Brookes. One of the purposes of Unification Thought is a critique and counter-proposal to Marxist philosophy.