What would you undo if you could change the past? Extremity is a nail-biting, time-travelling police procedural from bestselling author Nicholas Binge. For fans of True Detective and Philip K. Dick. 'Grand, unputdownable, exhilarating . easily in the running for the best novella of the year' - The Fantasy Hive Infamous police detective Julia Torgrimsen is brought out of forced retirement to investigate the murder of Bruno Donaldson, a billionaire she worked with while undercover. But she doesn't expect to find two bodies. Both are Bruno, identical down to the fingerprints - and both have been shot. She soon finds herself on the hunt for a mysterious assassin who has been taking out London's rich elite one by one.

But when she finally catches up with her quarry, she unveils a world of deadly secrets: impossible documents about future stock market crashes; mysterious doppelgangers; and a conspiracy that threatens the entire human race. To have any chance solving this mystery, Julia will have to revisit her undercover past and the brutal act that destroyed her once-legendary career . ' I was so tense I could feel every muscle locking up in my body. This was what if Christopher Nolan directed an episode of X-files or Fringe and I sincerely want more' - FanFiAddict 'A sharp, intelligent, and potent shot of sci-fi thriller excellence' - Ginger Nuts of Horror * * * Readers are gripped by Extremity : 'A wild race against time, clever and impossible to put down' - 5* NetGalley Review, August 2025 'A perfect balance of action, mystery and jeopardy' - 5* NetGalley Review, August 2025 'A great read, lots and lots of action' - 5* NetGalley Review, August 2025.