Jason Frost is an in-house pseudonym used by two authors,Raymond Obstfeld (born 1952) and Rich Rainey, who wrote the six book series called The Warlord published by Zebra Mens Adventure, a division of Zebra Books that is ultimately a subsidiary of Kensington Publishing Corporation. The books were written and published from 1983 to 1987 .
Pulp fiction genre. After twin earthquakes have broken California off from the US mainland and surrounded it with an impenetrable radioactive zone, a large group of people are cut off from everyone else with no single unifying government. Through the travels of a thirty-something survivor, the books describe the sociological situation in the aftermath. Books #1-5 were written by Obstfeld while #6 was written by Rainey.