Ragnar Benson is the pen name of a prolific survivalist author who specializes in preparedness topics, particularly survival retreats, hunting, trapping, austere medicine, false identification, explosives, firearms, and improvised weapons. Many of his books were published by Loompanics Unlimited (which went out of business in 2004) and by Paladin Press. Both Benson and Paladin Press are controversial, because actually formulating or constructing many of the explosives and weapons that he describes would be illegal in most jurisdictions. Some of his books have been banned ("challenged") from importation into Canada, by the Customs Canada censors at the Connaught Building. His book Ragnar's Guide to Home and Recreational Use of High Explosives was reportedly pulled from distribution in 1999.