Before his diagnosis, DCI Mark Lapslie thought everyone was like him. Now he knows he suffers from synaethesthesia - a rare neurological condition that has cross-wired his senses. The sickening clamour of sounds he can taste has smothered his marriage and stifled his career. At the scene of a fatal traffic accident, Lapslie’s interest isn’t in the recently deceased driver, rather the desiccated corpse found lying next to him. Something about the body stirs a fleeting recollection at the back of Lapslie’s mind... he can't quite put his finger on it, but he can almost taste it... Memories haunt Violet Chambers too. She does what she can to stay ahead of them. Taking tea with her elderly friend Daisy, she knows it’s time to move on again. As Daisy falls to the floor, skin burning, eyes streaming, Violet calmly waits. Black hellebore is remarkably potent poison. It won’t be long now. Still Waters is a visceral thriller that will bring DCI Lapslie face to face with a calculating predator, where the troubled detective might just discover that his gravest weakness is also his greatest strength.