
Ragnar Benson is the pen name of the prolific survivalist author Larry Grupp, of Moscow Idaho, who specialized in preparedness topics, particularly survival retreats, hunting, trapping, austere medicine, false identification, explosives, firearms, and improvised weapons. He was executive director of the Moscow Chamber of Commerce from 1972 to 1977 and ran an agriculture consulting business from his home on Paradise Ridge.

Survival poaching
1980
ISBN 9780873641838
Eating Cheap
1982
ISBN 9780873642521
Survivalist's medicine chest
1982
ISBN 9780873642569
Ragnar's tall tales
1983
ISBN 9780873642637
Hardcore Poaching
1987
ISBN 9780873644358
Modern weapons caching
1990
ISBN 9780873645836
Homemade C-4
1990
ISBN 9780873645584
Ragnar's Big Book Of Homemade Weapons
1992
ISBN 9780873646604
Ragnar's homemade detonators
1993
ISBN 9780873647373
Ragnar's Action Encyclopedia
1995
ISBN 9780873649261
David's tool kit
1996
ISBN 9781559501439
Do-it yourself medicine
1997
ISBN 9780873649186
Ragnar's guide to the underground economy
1999
ISBN 9781581600117
Guerrilla Gunsmithing
2000
ISBN 9781581601190
Ragnar's Guide To Interviews, Investigations, And Interrogations
2000
ISBN 9781581600957
Ragnar's guide to home and recreational use of high explosives
1988
ISBN 9780873644785