The newsletters allegedly are filled with advice ranging from how to deal with possible undercover officers to tips on handling clients who attempt to videotape assignations, the report said.
While Palfrey expected her workers to have sex with clients, they were allowed to refuse if the client appeared to be diseased, according to the Web site.
Prosecutors say Palfrey recruited college-educated girls through ads on the Internet and in newspapers, including the student newspaper at the University of Maryland.
Palfrey has denied running a prostitution business.
Notable deaths of 2014 [PHOTOS]