Seven Things You Need To Know About AnarchismNote: There is a newer version of this poster available.
If you want to go into more detail, I recently found some old flyers I made a while ago that summarise two books by Stefan Molyneux, Everyday Anarchy and Practical Anarchy. Check them out and download if you would like to share them around.
If you want to get even more information, you can also try a book called The Market For Liberty by Morris and Linda Tannehill. They do an excellent job of building up a philosophical and practical case for a stateless society.