Holy Island: The DCI Ryan Mysteries, Book 1 (Unabridged)
2015
Sycamore Gap: The DCI Ryan Mysteries, Book 2 (Unabridged)
2016
Heavenfield: The DCI Ryan Mysteries, Book 3 (Unabridged)
2016
Angel: The DCI Ryan Mysteries, Book 4 (Unabridged)
2016
Cuthbert's Way: The DCI Ryan Mysteries, Book 17 (Unabridged)
2021
Impostor: An Alexander Gregory Thriller (The Alexander Gregory Thrillers Book 1) : The Alexander Gregory Thrillers, Book 1 (Dr Alex Gregory)
2019