Reading order
| # | Title | Published | Author | Buy on Amazon |
|---|---|---|---|---|
| 1 | Sleeper Agent | 2021 | John Birmingham | Buy |
| 2 | Vengeance | 2024 | John Birmingham | Buy |
Sleeper Agent is John Birmingham’s espionage thriller series, originally released through Audible as an Audible Original in 2021. The series deals with covert operatives and hidden threats in a contemporary setting, playing to Birmingham’s strengths in writing military and intelligence fiction.
The first book was designed for the audiobook format, taking advantage of the medium for a thriller that benefits from pacing and tension. Vengeance (2024) continued the story, expanding on the characters and conflicts established in the original.
Birmingham has written extensively in the thriller and military fiction space, and the Sleeper Agent series represents his work in a more grounded, present-day espionage mode compared to the science fiction and alternate history of his other series. The Audible Original format gave him access to a different audience than his traditional publishing.