Anderson and Costello are fast becoming the crime pairing du jour. In Caro Ramsay's latest thriller, Dark Water, the detectives are up against another vicious killer. In the flashback chilling opener a woman is hunted down through the fog in a high-speed car chase that ends with an ominous click. Fast forward to the present day and it's clear Mr Click is back. And Ms Twist - for Ms Ramsay keeps us wrong-footed all the time as murders and suspects pile up. Cop shop politics make things even trickier while the personal lives of Anderson and Costello threaten to implode. This is just so riveting that it's impossible to go into the story without giving away the vital clues that hold together this tour de force. With her debut novel, Absolution, Ms Ramsay hit the ground running as the Queen of Tartan Noir and on this form is unlikely to give up her crown. The rave reviews adorning the cover don't come close to telling you how good Ramsay really is - whether it's her grasp of the destructive nature of human relationships, the deftly drawn Glaswegian background, snappy dialogue, her mastery of the office intrigue that undermines the investigation, or the bittersweet symphonies that haunt the personal lives of her main protagonists.