Bitter Orange by Claire Fuller; 2018. Hardcover.

Bitter Orange is a psychological portrait, a keyhole into the dangers of longing and how far a woman might go to escape her past. From the attic of Lyntons, a dilapidated English country mansion, Frances Jellico sees Cara and Peter. The couple is spending the summer of 1969 in the rooms below hers while Frances is researching the architecture in the surrounding gardens. But she's distracted. Beneath a floorboard in her bathroom, she finds a peephole that gives her access to her neighbors’ private lives.

To Frances' surprise, Cara and Peter are keen to get to know her. It is the first occasion she has had anybody to call a friend, and before long they are spending every day together: eating lavish dinners, drinking bottle after bottle of wine, and smoking cigarettes until the ash piles up on the crumbling furniture. But as the hot summer rolls lazily on, it becomes clear that not everything is right between Cara and Peter. Amid the decadence, a small crime brings on a bigger one: a crime so terrible that it will brand their lives forever.