The first four books in Martha Wells’ brilliant sci-fi series The Murderbot Diaries comprise the novellas All Systems Red, Artificial Condition, Rogue Protocol and Exit Strategy, all published by Tor.com between 2017 and 2018. Across the four stories they tell the tale of a rogue SecUnit which calls itself Murderbot – a part-human, part-machine android designed and created to be hired out to anyone who needs security and can pay its parent company’s fees. Unlike most SecUnits, Murderbot has hacked its governor module to give itself freedom from company control, and is largely content to pay little attention to its actual job, and instead consume endless hours of media via its data feed. It’s also distrustful of humans, low-key sassy and emotionally vulnerable in a remarkably relatable way.