How do I love this book? Let me break it down:
The first striking and delightful thing about this book is the prose voice -- well, all of them, really. The Overnight opens and closes with manager's POV, but the bulk of the novel is comprised of individual chapters presented through the eyes of specific employees. All the expected personality archetypes are present -- and I say that as someone who lost a couple of years working in a bookstore. You've got your ambitious suck-up, the fussy mother-hen children's section director, a single mom who took the job in part for flexibility's sake, an antagonistically gay man, a grouchy feminist who objects to her perceived corporate serfdom, a sleepy half-competent stoner ... etcetera, etcetera.
If I didn't know better, I'd swear Campbell had been following me around during the years I worked at McKay's. We even had a temperamental elevator, too. Holy moly. The man is a spook.
The second surprising and impressive aspect of the story is how utterly painful it is. The conflicts are so real, and so well-drawn, that I cringed away from them. They itched. I found the plight of dyslexic but dedicated Wilf to be particularly angst-inducing; I've always had a hard time with numbers the way he has a hard time with letters, and it's both humiliating and infuriating. Also beat-your-head-against-a-wall accurate: Connie's persistently regenerating typos. Oy. The head hurty.
The third noteworthy and laudable characteristic of The Overnight is the creep factor. It sneaks in slowly, but certainly. It's always present in that frustrating way that could, in a pinch, by logical people, be explained away by weather or human incompetence. This is the thing -- the story does not rely on stupidity. The Texts employees are rational people (more or less), and they respond to the swelling threat with appropriate actions. The real narrative coup is that Campbell creates a credible threat that overwhelms the staff members despite their competent handling of the situation. It's a tough line to walk -- and it's one that is rarely skirted well.
I've read a bit of complaint here and there that the first half of the book is boring, and I understand the criticism but I disagree with it. The first half is spent establishing (a). character development and (b). the undercurrent of threat ... and while it isn't as action-packed as the second end, I felt that the writing style itself carried me through the slower sections.
Campbell could be composing ad copy for sports socks in his sleep and I'd still hang in there for the ride. He writes with exactly the kind of dexterity that I aspire -- someday, in my finer moments -- to get near enough to tap with a ten-foot pole. The long and short of it is this: I loved this book. It's a polished little gem of fright and filth. It entertained me with its prose, it surprised me with its depth, and it unnerved me with its story.
Excellent stuff.