Detective Inspector Quigg and Sergeant Lulu Begone (on an exchange programme from the South African Police Service) must hunt down a festive serial killer who is selecting his victims to match the Christmas carol - The Twelve Days of Christmas. Each day, victims are found stabbed with their clothes removed and their faces ripped off. A verse from the carol is daubed on the wall in blood. Will Quigg find the killer before he is forced to resign? Also, Quigg must choose between two women, or must he? And can he persuade the Chief to let Sergeant Begone be his partner on a permanent basis?

Detective Inspector Quigg and his temporary partner new recruit Police Constable Mavourneen Duffy hunt for a stolen corpse – tagged as Body 13 – from the mortuary at Hammersmith Hospital, which leads to the discovery of an exclusive paedophile ring called the Apostles who traffic in children. Also, Quigg's private life gradually becomes as complicated as the investigation when he gets sucked into a ménage à trois.

The sequel to Body 13 has Detective Inspector Quigg and Detective Constable Heather Walsh (his new temporary partner) trying to identify a serial killer who carves biblical references into his child victims. As they struggle to solve the riddle of the twenty-three missing children over the past sixty years, a psychic from Canada arrives to help them. Quigg continues to battle the exclusive paedophile ring called the Apostles to bring them to justice, and his private life becomes even more complicated when a hacker called Lucy joins his ménage à trois.

The fourth in the Quigg series. Quigg faces his most difficult case yet when over a thousand skulls are discovered beneath Eternity Wharf in Fulham. Quigg and Walsh must investigate the past and the present to find out the truth behind the skulls. Walsh is seriously injured while chasing a suspect in the underground chamber, and ends up in hospital. The Chief gives him the crazy Tallie Kline as his new temporary partner, and together they begin to amass clues and follow strange leads towards an astounding conclusion. Also, the exclusive paedophile ring – the Apostles – are planning to finally rid themselves of Quigg and his troublesome hacker – Lucy. As these two threads unfold, there are more twists and turns than the Minotaur’s maze.

Quigg and Kline are struggling to fit the pieces of a multiple murder together when the past and present intersect in Room 13 at the Waterbury Hotel in the horror theme park that is Grisly Park.