Fred Harrison now has a youtube video version of his Ricardo’s Law, which explains how a “progressive” income tax actually traps the poor and benefits the rich. Mairead Sullivan, Ben Kettlewell, Ross Ashcroft, Ben Holland, and Megan Campbell are also credited on the project.
If you only have 8 minutes to spend learning about this stuff, or as an introduction, the video is recommended.
update Feb 26: The youtube link is changed above. Also there is an alternative link.