The House on the Water — Margot Hunt

From the author of Buried Deep comes a brand-new thriller about a summer vacation turned deadly and a group of friends trapped together until they can determine who among them is capable of murder.

Every year, Caroline Reed takes a trip with her best friend, Esme Lamont. They're usually accompanied by their spouses - but this year, everything's changed.

Esme has just gone through a bitter divorce, and Caroline is wondering if her own marriage is reaching its breaking point as she and her husband, John, cope with the discovery that their 19-year-old son has been abusing drugs. Still, the inseparable duo books a weeklong stay at a beach-front home in Shoreham, Florida, inviting Esme's brother, Nick, and his new husband, Ford, in hopes that the additional guests will help lighten the mood.

After a blissful first night in the vacation home, tragedy strikes, and one of the houseguests is found dead. While it's assumed at first to be a horrific accident, it quickly becomes clear that there's something more sinister at play, and over the course of this fast-paced, deeply chilling novella, the potential motives of each guest are revealed - until a shocking conclusion is reached.