Angelo's Guest is John E. Mann's third mystery novel. It reaches back as far as the Korean War and winds its way into the modern day world of Detective Joe Kepper, a top investigator on the Marlboro County Maryland police force. Most of the action takes place in and around Washing DC where high level officials with connections to the DEA decide on new and more lucrative approaches to operate the drug trade. Like all major cities, a drug culture already exists and has no intentions of bowing out and giving in to these new intruders who seek to share what has been their territory for quite some time. There are shootouts between the two factions, attempted murders, entrapment and a bit of romance. Jose Kepper and his assistant, Sam Stevens are pushed to the limit and Joe's dad old friend, Angelo comes to the rescue by insuring the safety of a mysterious witness.