accesscontrol airtankers(militaryscience) arthur captain(fictitiouscharacter) classifieddefenseinformationinfiction defensecontracts detective england evaluation ficción fiction general governmentalinvestigations hastings hercule(fictitiouscharacter) hercule(personajeliterario) herculepoirot(fictitiouscharacter) largetypebooks lettingofcontracts militaryairplanes mystery novelademisterio novelapolicíaca openlibrarystaffpicks poirot policeprocedural privateinvestigators privateinvestigatorsinfiction procurement purchasing romanpolicier secretosmilitares traditional unitedstates