The Baroness is the name of a short-lived series of espionage novels by Paul Kenyon published in the mid-1970s. This violent, though generally well-written series of books, inspired somewhat by Peter O'Donnell's Modesty Blaise, profiles the adventures of Baroness Penelope St. John-Orsini, a hedonistic playgirl by day, a cold-blooded superspy by night.

At least eight Baroness novels were published within the space of one year (1974-1975). Published at a time when male characters such as Nick Carter and Mack Bolan dominated the paperback spy series genre, The Baroness series distinguished itself by featuring a female character who was just as bloodthirsty as her male counterparts.

The Baroness series consisted of:

1. The Ecstasy Connection
2. Diamonds Are for Dying
3. Death is a Ruby Light
4. Hard-core Murder
5. Operation Doomsday
6. Sonic Slave
7. Flicker of Doom
8. Black Gold