The Gastropoda Imperative, by Peter Barns

An experiment gone wrong places everyone in danger and Conal Mitchell is tasked with clearing it up, but five years later he realises that things were not as they seemed. Conal Mitchell, PA to one of the world’s richest men – Lyra Harrison, a city girl tasked with looking after her aunt’s smallholding – Piers Booth, set on revenging his mother’s death – five teenagers searching for a party. When they meet on Flat Rock Island, it becomes a race against time for survival.