For Reasons Unknown (DCI Matilda Darke Thriller, Book 1)Two murders. Twenty years. Now the killer is back for more DCI Matilda Darke has returned to work after a nine month absence. A shadow of her former self, she is tasked with re opening a cold case: the terrifyingly brutal murders of Miranda and Stefan Harkness. The only witness was their eleven year old son, Jonathan, who was too deeply traumatized to speak a word. Then a dead body is discovered, and the investigation leads back to Matilda's case.