Killing by Colours, the third in the DCI Martin Phelps series, takes Martin in search of a serial killer who appears to have something of a personal interest in the DCI himself. When the body of the killer's first victim is discovered at a popular Cardiff leisure attraction, key elements of the murder link her death to a macabre colour-themed poem recently sent to DCI Phelps. As the body count rises, the killer teases the team by giving possible clues to the whereabouts of victims and the venues of potential murders, in the form of more poems. Are the killings random acts by a deranged individual, or is there something that links the victims to one another – and even to the DCI himself? Meanwhile, Martin's sidekick, DS Matt Pryor, is worried about the safety of his boss. Are his fears warranted? Is Martin Phelps on the colour-coded list of potential victims – or is he just the sounding board for the killer's bizarre poetry?

'Jack-Knifed' is the first novel featuring DCI Martin Phelps and his team, based in the world-famous and vibrant Cardiff Bay. Mark Wilson, a decent, well-liked gay man, lives alone in a beautiful house in Cardiff. One Saturday evening, his closest friends go to his house for an evening of drinks and catching-up. Finding no answer, the concerned friends break in – to a horrific murder scene. For Mark Wilson has been brutally, sadistically murdered in his own home. As DCI Phelps investigates, Mark's traumatic early life is revealed. Was his killer someone from his past? Was his sexuality a motive? What about his violent, homophobic father – a man who has already killed more than once ... Meanwhile, Mark's estranged sister Amy broods on the hatred she has for her brother, blaming him for turning their father into a killer. As she sinks further in to the depths of drug addiction, who's to say what her next move will be? As the body...

Newly promoted DI Matt Pryor is disappointed when his first case seems to be a simple death from natural causes – that is, until the post-mortem shows something quite unexpected ... The elderly man who died on a Cardiff train was murdered – poisoned – by one of the other passengers. But who? There's a photograph in the dead man's pocket – a photograph that matches one owned by young professional Ellie Bevan. Is it just a coincidence that Ellie's the one who stayed with the body until the police arrived – or did she have a more sinister reason for sticking around? Matt's boss DCI Martin Phelps is delving into a tricky case of his own. The new superintendent is determined to clear up any old cases with a whiff of police corruption about them and Phelps is sent to investigate the decade-old murder of a young Somali man. He soon discovers that the police reports are filled with errors. Sloppy detective work – or a cover-up?...

The first novel in this series, Jack-Knifed, saw the introduction of Detective Chief Inspector Martin Phelps, together with his sidekick, Detective Sergeant Matt Pryor, and their team, investigating the horrendous murder of a gay man in Cardiff. Now they are faced with a body found in Coopers Field, a Cardiff beauty spot – a naked body that has lain there so long it is almost unidentifiable. Pathology reports establish that the body is that of a woman – but who is she, and how did she die? Local nurse Sarah Thomas, a helpful passer-by when the body is found, soon finds that she has another unexpected death to deal with – at Parkland Nursing Home where she works. Colin James, one of her favourite residents at the home, dies suddenly – but the reactions of those closest to him are surprising. Was Colin's death due to natural causes – or is there something more sinister afoot at Parkland? The Coopers Field Murder is the second in...

A school trip to the National History Museum of Wales at St Fagans ends early with the disappearance of a child. Is he just playing hide and seek – or is it the work of a criminal? Perhaps a kidnapper with designs on the boy's mother and her recently-acquired millions? DCI Martin Phelps and his team are back together just in time to take on the case – one that starts off as a possible kidnapping but soon descends into something even more sinister ... As the investigation exposes the complexities of family relationships, another long-standing mystery is solved – all while Martin and his colleagues anxiously await the results of a major police review that may result in them losing their jobs ...