Bourne are a series of three novels by Robert Ludlum based on the fictional spy Jason Bourne. The series has since been further extended by Eric Van Lustbader after the death of Robert Ludlum. When Eric Van Lustbader decided to stop writing the Bourne novels during the writing of The Bourne Nemesis,^[1] Brian Freeman was approached by the Ludlum estate to continue the stories of Jason Bourne.^[2]

The original three Bourne novels are:

• The Bourne Identity (1980)
• The Bourne Supremacy (1986)
• The Bourne Ultimatum (1990)

The continuation novels are:

• The Bourne Evolution (2020)
• The Bourne Treachery (2021)
• The Bourne Sacrifice (2022)
• The Bourne Defiance (2023)

A new series, inspired by Robert Ludlum's Bourne universe and centered on Adam Hayes, another Treadstone agent, began publication in 2020, written by Joshua Hood:

• The Treadstone Resurrection (2020)
• The Treadstone Exile (2021)
• The Treadstone Transgression (2022)
• The Treadstone Rendition (2023)

The Bourne Identity has been adapted into live action twice. The first adaptation is a 1988 television film starring Richard Chamberlain and Jaclyn Smith. The second is a 2002 feature film series starring Matt Damon, which proved to be a strong critical and commercial success, launching the Bourne film series, which consists of five films, with the fifth being released in July 2016.^[4] The television series Treadstone was connected to and based on the book series. The show was created by Tim Kring and premiered October 15, 2019. In May 2020, the series was canceled after one season.