When your perfect lodger knows all your secrets, who's really in control? Former MI6 agent Jonathan Cavendish thought he'd lost everything when his career imploded overnight. Facing bankruptcy and desperate to keep his Belgravia townhouse, he and his wife Charlotte make a decision that will change their lives forever: they take in a lodger. Sophie Whitmore seems like the answer to their prayers. Beautiful, charming, and refreshingly down-to-earth, she pays her rent in cash and keeps to herself in the converted attic room. The perfect lodger. But something isn't quite right. The neighbours start acting strangely. Books fall from shelves in the middle of the night. Jonathan catches glimpses of Sophie standing motionless in the garden at 3 AM, staring up at the house as if she's watching someone inside. Then Jonathan discovers the truth: Sophie isn't just a struggling writer looking for cheap accommodation. She's conducting surveillance on his family. She knows about his classified past, his darkest secrets, and exactly how desperate he's become. Worse still, she works for people who want something from him, something worth killing for. Trapped in his own home with his family under threat, Jonathan faces an impossible choice: betray his country to protect the people he loves, or risk losing everything that matters to him. But Sophie has made one crucial mistake. She's underestimated the man she's trying to manipulate. Jonathan didn't survive fifteen years in intelligence by giving up when cornered. The game is just beginning. ⭐⭐⭐⭐⭐ "Absolutely gripping! I devoured this in one sitting. The psychological tension is incredible."⭐⭐⭐⭐⭐ "A brilliant domestic thriller with real depth. The characters feel so authentic you'll forget this is fiction."⭐⭐⭐⭐⭐ "Perfect blend of family drama and spy thriller. Couldn't put it down!"