The Dying Time by Anthony Carragher

Architect Kate O'Connor appears to have it all. A lighthouse home, a successful politician husband and an eight-year-old daughter. Yet everything is not as it seems.
A snowstorm approaches, and with it arrives a menacing stranger whose presence will change everything. A haunted man, driven by destiny, set to wreak havoc on Kate's carefully constructed life. Over the course of twenty four hours, as intersecting paths tragically entwine, Kate discovers that everything she holds dear is in peril.
Isolated by the unrelenting storm, in a desperate race against time, Kate and her family face a battle of wits with the highest stakes. Their lives.