I wouldn't call this a thriller. Nor did I think it was fast-paced. The Passenger reads more like a survival story than an exciting psychological thriller or clever mystery. In fact, the only moment of brilliance was when we discover the meaning behind the title, as Lutz did a good job of making small allusions that were not annoyingly vague or easy to unravel like she did with the events that prompted the MC's initial run. 
 For the most part, the MC buys crap, travels along various highways, purchases cars, squats, commits a few petty and not-so-petty crimes, dyes her hair, and has a lot of inane, small talk at bars with persistent and socially obtuse men. She changes identities frequently but doesn't bother giving her new selves any personality or backstory beyond a few artificial details, like "Tanya hates avocados and broccoli." In fact, her identity changes seem to revolve more around using a different name and changing her physical appearance, whereas I was hoping for more of a Sybil-type transformation from one persona to another. She is also terrible at running, bumbling and creating more problems for herself, though she attempts to think like someone skilled at deceit and trickery. 
 There's also a "mystery" - events that happened prior to her life as Tanya DuBois and an interesting, slightly sociopathic companion, who breathes a little life and personality into the story, on top of wondering whether she has the MC's best interests or is playing her for a fool. In fact, (view spoiler)[if Blue had actually lured her back to her hometown to betray her, simply because Blue is CRAY, I think that would have made for a better ending than this half-assed "get to be with mah cop lover now who doesn't care that I'm a murderous, lying criminal" or even if said cop had met MC at the bar and promptly arrested her. C'mon, they had sex once, and along with a couple of not-so-important flirty conversations, he's willing to overlook his morals and JOB as freaking sheriff to sit with her in a bar after she's lied to him multiple times and purposefully injured him? Come on. (hide spoiler)] If you like a true thriller that leaves you on the edge of your seat, I would say skip it.