<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2009) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2009) (Learn how and when to remove this template message) </Td> </Tr> <P> The Presidential Agent series was written by military author, W.E.B. Griffin . The series consists so far of eight novels, By Order of the President, The Hostage, The Hunters, The Shooters, Black Ops, The Outlaws, Covert Warriors, and Hazardous Duty . Like the rest of his novels, Griffin uses military time, along with the address of the place, and the chapter titles are never started on a separate page . The series is the author's latest . </P> <P> The main character, Carlos Guillermo Castillo, first appears as an Army major and is later promoted to the rank of lieutenant colonel . Carlos is also known as Karl Wilhelm von und zu Gossinger . The reason for the double name stems from his parentage . His father, U.S. Army Warrant Officer Junior Grade Jorge Alejandro Castillo, had a one - night stand with Carlos' mother . His mother, Erika von und zu Gossinger, never saw Jorge again as he died shortly thereafter, flying "his fifty - second rescue mission, picking up downed chopper crews, when he was hit and his Huey blew up ." Jorge Castillo was posthumously awarded the Medal of Honor . This allows Carlos to be admitted to West Point, which begins his Army career . </P>

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