Severance Books in Order

The Recommended Reading Order for the Severance Series

For readers diving into DCI Nick Severance's world of international crime and espionage, the best path is straightforward. British author Mark McKay wrote the series in a direct chronological sequence. To appreciate Nick’s evolution from a traditional London detective to a globetrotting freelance investigator, you should read the books in order of their publication.

1. A Terminal Agenda (2015)
2. A Trade to Die For (2016)
3. The Revenge Season (2016)
4. The Imperfect Assassin (2017)
5. The Brexit Affair (2017)
6. The Godzone Connection (2018)
7. The Ransom Note (2022)

Detailed Book-by-Book Breakdown

1. A Terminal Agenda (2015)

The series opens on Nick's home turf. As a Detective Chief Inspector (DCI) in London, Nick Severance is called to investigate a brutal murder near a local police station. What starts as a standard police procedural quickly escalates when the clues tie back to an ancient Indian tomb and a far-reaching international conspiracy. By the end of this high-stakes investigation, Nick’s life is permanently upended, setting the stage for his departure from the force.

2. A Trade to Die For (2016)

Having left the police department under intense pressure, Nick relocates to Tokyo, Japan. He finds himself recruited by a shadowy Japanese intelligence organization known as the Crimson Dragon Society. His first freelance assignment is to protect a retired MI6 agent who holds dangerous secrets. This entry shifts the series from classic British police grit to international espionage, introducing readers to the complex underworld of Tokyo.

3. The Revenge Season (2016)

Nick’s new career takes him to South America. In Peru, the murder of a prominent pharmaceutical researcher opens a Pandora's box of corporate greed and lethal secrets. Nick must navigate unfamiliar terrain and local corruption to get to the truth. This book completes what author Mark McKay originally structured and packaged as the core Severance Trilogy.

4. The Imperfect Assassin (2017)

Returning to international operations, Nick is pitted against a highly unusual threat: a genetically enhanced contract killer. The stakes become deeply personal in this installment, which also serves to solidify the role of Mariko, a key character who becomes Nick's partner in both life and investigation.

5. The Brexit Affair (2017)

Set slightly in the future (around 2019, following the UK's historic decision to leave the European Union), this novel brings Nick back to British soil. The political instability of a post-Brexit landscape serves as the backdrop as Nick assists MI6 in locating a missing intelligence operative and neutralizing a catastrophic computer virus.

6. The Godzone Connection (2018)

Now working as private investigators, Nick and his now-wife Mariko are hired by a private bank in Tokyo to track down an employee who disappeared with $10 million. Their search leads them across the globe to New Zealand—known colloquially as "Godzone" (God's Own Country). The scenic backdrop contrasts sharply with the dangerous figures trailing the stolen money.

7. The Ransom Note (2022)

In the most recent full-length adventure, Nick and a pregnant Mariko return to live in the United Kingdom. Settling back into British life is short-lived, however, as Nick is hired to handle a highly sensitive ransomware attack hitting a major hotel group, a case that quickly intertwines with a suspicious hit-and-run fatality.

What to Know Before You Start

Chronological Continuity is Key

While each book presents a self-contained mystery or mission, the overarching narrative of Nick Severance's personal and professional life is highly continuous. Reading them out of order will spoil major character developments, including Nick's transition from police officer to private operative, his evolving relationship with Mariko, and their eventual marriage and family expansion.

Clearing Up the "Severance" Name Confusion

Because "Severance" is a popular title in modern media, new readers should note that Mark McKay's series is entirely separate from two other famous works:

• Ling Ma's Severance: This is a highly acclaimed, standalone 2018 post-apocalyptic novel centering on a global pandemic ("Shen Fever"). It is literary fiction and has no connection to McKay's action-thrillers.
• The Apple TV+ Show "Severance": Directed by Ben Stiller and written by Dan Erickson, this sci-fi thriller series about corporate office worker brain-partitioning is an original concept and not an adaptation of Mark McKay’s books.

Tone and Style

Mark McKay studied creative writing at the University of East Anglia, and his diverse real-world experience—ranging from IT to wine sales—shows in his attention to technical and cultural details. Readers can expect a gritty, realistic approach to tradecraft, martial arts, and police procedures, combined with the quick pacing of international thrillers.