Articles (10+ pages in length)

• A Libertarian Argument Against Open Borders (PDF, 13 pages, ungated) by John Hospers, Journal of Libertarian Studies 13:2 (Summer 1998): 153–165, part of a special issue on immigration by the Journal of Libertarian Studies.
• The Case for Free Trade and Restricted Immigration (PDF, 13 pages) by Hans-Hermann Hoppe, Journal of Libertarian Studies 13:2 (Summer 1998).
• The Fallacy of Open Immigration by Stephen Cox (webpage version on LewRockwell.com)

Books

Not all these books are against all immigration. Some books support high-skilled immigration while opposing low-skilled immigration. The common thread is that these books reject the presumption in favor of immigration and instead contend that immigrants need to be carefully selected and restricted.

• The New Case Against Immigration: Both Legal and Illegal (Amazon hardcover) by Mark Krikorian of the Center for Immigration Studies.
• The Immigration Solution: A Better Plan Than Today’s (Amazon hardcover, Amazon ebook) by Heather Macdonald, Victor Davis Hanson, and Steve Malanga.
• Alien Nation: Common Sense about America’s Immigration Disaster (free online version (text, PDF, ePub, Kindle, and other formats), Amazon) by Peter Brimelow of VDARE. The book was re-released in 2007 under a Creative Commons license.
• State of Emergency: The Third World Invasion and Conquest of America (Amazon paperback — hardcover and Kindle versions also available) by Pat Buchanan.
• Invasion: How America Still Welcomes Terrorists, Criminals, And Other Foreign Menaces To Our Shores (Amazon paperback) by Michelle Malkin.