There is something exciting about publishing the third book in a series. The setting, based around Cardiff Bay, has become familiar and the characters have become people we know and care about. All three novels can be read as stand-alone books but to get the best from the series read Jack-Knifed first and then The Coopers Field Murder. You will then want to know how the team cope with a serial killer who has a macabre interest in the rainbow and poetry. Welcome to the third book in the DCI Martin Phelps series. Welcome to Killing by Colours.