I'm glad you're finally talking to an actual one. Many people call themselves one who haven't actually thought much or read much about it.
If you want a book written by another actual libertarian, "Free to Choose" by Milton Friedman is a good start.
The neato thing about libertarianism is it doesn't have to be perfect in order to work. Since nothing about human societies can be perfect, this is fine feature. The more libertarian a country is, the better it runs.