The Housemaid’s Wedding by Freida McFadden.

The Housemaid's Wedding by Freida McFadden is a short winter-themed novella , designed to bridge the gap between The Housemaid's Secret (Book 2) and The Housemaid Is Watching (Book 3).

Premise
Today is supposed to be the happiest day of Millie Calloway’s life: she is finally marrying Enzo, the man of her dreams, at City Hall. They’ve built a deep, protective love, and Millie is ecstatic to walk down the aisle.

There’s just one classic Freida McFadden problem—it wouldn't be Millie's life without immediate danger. As the day unfolds, Millie starts receiving chilling, anonymous phone calls from a man who is watching her every move, knows what she's wearing, and makes it clear he doesn't intend to let her live long enough to say her vows. Desperate not to ruin her special day or worry Enzo, Millie tries to handle the terror on her own while navigating family drama, cold winter weather, and a wedding ceremony that feels like a ticking clock.