Why The Co-worker Didn’t Quite Live Up to the Hype

Alright, buckle up, because I need to spill about The Co-worker by Freida McFadden—and yes, it’s the kind of thriller that’ll have you glancing over your shoulder while you finish it.

McFadden has built her reputation on twisty, fast-paced stories that yank you from one page to the next, and this one? It delivers that signature tension in spades. The story kicks off with Natalie Farrell, a socially awkward, hyper-meticulous woman whose sudden disappearance rips through her office like a shockwave. Natalie isn’t your average co-worker—she’s autistic, structured, brilliant, and painfully meticulous—and when she vanishes without a trace, the whole office feels it. Everyone’s whispering, everyone’s nervous, and no one seems to know what’s really going on.

Enter Dawn Schiff, the bubbly, friendly coworker who finds herself unwillingly at the center of the chaos. She was the last one to see Natalie, and suddenly her workdays are loaded with whispered gossip, tense meetings, and a creeping sense that someone—or something—is watching. Dawn isn’t a detective, but she’s smart enough to notice the cracks, the inconsistencies, and the small betrayals that ripple through office life. As the story unspools across shifting timelines and perspectives, McFadden masterfully ratchets up the tension: short chapters, alternating viewpoints, and just enough misdirection to make you question who you can trust.

What makes this thriller hit differently is Natalie herself. She’s complex, neurodivergent, and painfully real. The way McFadden portrays her world—the routines, the precision, the social nuances—adds layers of empathy and urgency to the narrative. You feel her absence in a visceral way, and the stakes suddenly feel personal. It’s rare to see a thriller center around someone like Natalie, and that perspective gives the story emotional weight that elevates it beyond just “who did it?”

But—and yes, there’s a but—where The Co-worker falters is in some of its supporting cast. Dawn starts bright and promising, but her character arc doesn’t quite land. She has secrets, she has tension, she has potential, but she never fully evolves into someone you can root for with the same intensity as Natalie. Other characters are thinly sketched, which makes their motives murky and some plot twists feel convenient rather than inevitable.

Speaking of twists… McFadden throws in a classic shocker involving a secret office romance, and while it’s undeniably dramatic, it lands a bit awkwardly. The reveal doesn’t flow naturally from the narrative—it’s the kind of twist that makes you pause and squint at the page, going, “Wait, really?” instead of gasping in awe. And unfortunately, the ending doesn’t quite redeem it. The resolution feels rushed, some motivations are left murky, and Dawn’s role in tying it all together is vague enough to leave you wishing for more payoff.

That said, you can’t deny McFadden’s talent for suspense. The pacing is addictive. The office setting—gossipy, claustrophobic, full of microaggressions and social undercurrents—feels lived-in, grounding the story even as the tension ramps up. Every small lie, every overlooked glance, every whispered conversation becomes a potential trigger for danger, and that creeping unease keeps you flipping pages like a fiend.

In the end, The Co-worker is a twisty, fast-paced thriller with emotional depth and a neurodivergent lead who sets it apart from the crowd. It’s not flawless, and the ending leaves a little to be desired, but the ride is enjoyable, suspenseful, and occasionally spine-tingling. You’ll feel the tension, you’ll question motives, and yes—you’ll probably double-check your office contacts after reading.

Rating: 3/5 — solidly entertaining, but the resolution left me craving that extra punch of payoff that McFadden usually nails.