If it's a twisty mystery you're after, you can't go wrong with "The Paris Apartment" by Lucy Foley. When Jess's personal and professional life falls apart, her half-brother reluctantly agrees to let her escape for a bit and stay with him in Paris. Upon her arrival, however, Jess is surprised to discover that her brother is nowhere to be found — and the neighbours in his building all seem to be hiding something. The more she tries to uncover what really happened to her brother, the more danger Jess herself is in. It's the kind of thriller you won't want to put down until you know what happened!