Bakåt
Delphine de Vigan: Underground time (2011, Bloomsbury USA)

"Everyday Mathilde takes the Metro, then the commuter train to the office of a large …

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Liked it a lot, if by "liked" you mean "experienced a slightly nauseous feeling of creeping dread that didn't require anything more supernatural than people being dicks towards each other". A story of two 40-year-olds lost in Paris, tied together by invisible threads that aren't even allowed to snap. Good stuff.