Series Information: Penetrator, the
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Description's Source: From the publisher
Mark Hardin. Discharged from the army, after service in Vietnam. His military career is over. But his war was just beginning. His reason for living and reason for dying become the same - to stamp out crime and corruption wherever he finds it. He is deadly; he is unpredictable; and he is dedicated. He is The Penetrator!
All 53 books were credited to Lionel Derrick, however Mark K. Roberts wrote the odd-numbered entries while Chet Cunningham wrote the even-numbered entries.