Ricardo's Law - The Great Tax Clawback Scam - Fred Harrison. Highly accessible 8 minute video explaining the tax scam
Henry George - Progress and Poverty online abridged version (recommended if you want to find the heart of political economy)
Henry George - The Single Tax, What It Is and Why We Urge It 1890
Henry George - The Science of Political Economy
Seeing the cat, the aha moment around the whole economic picture
Complete book "Wheels of Fortune" by Fred Harrison. Self-funding Infrastructure and the Free Market Case for a Land Tax
UK LVT campaigning site - Land Value Tax Campaign, very well written articles
Fred Harrison has written extensively on the topic
Wikipedia entries