Published on 21 April 2026, the book combines romantic suspense, domestic thriller tension and contemporary British and Irish settings, with a distinctive companion soundtrack available on Spotify.
Set between Hampshire and Tipperary, Fatal Equation: Sweet Revenge follows Laura and Ali as they try to rebuild their lives after the devastating events of the first novel. As Laura pursues her philanthropic ambitions and Ali focuses on his music career, a figure from the past returns with revenge in mind, pushing their fragile future into danger.
Written to work both as a stand-alone novel and as part of the wider trilogy, the book blends relationship drama, psychological threat and a strong sense of place. Its cross-media concept is one of its defining features: readers can also listen to the Coolstar playlist created to accompany the story, adding an immersive musical dimension to the novel.
“I wanted Fatal Equation: Sweet Revenge to combine the emotional pull of romance, the tension of a thriller and the atmosphere of music,” Gethyn Jones told That's Books and More.
“The companion soundtrack gives readers another way to enter the world of the story.”
Jones brings decades of experience in broadcasting and music to his fiction. Fatal Equation: Sweet Revenge is available now in Kindle and paperback formats on Amazon UK:
The trilogy website is available at https://fatalequation.com, and the companion soundtrack can be heard on Spotify via the Coolstar playlist.
