I think my initial reaction to the very existence this book may well have been the same as many others' - why, or even how, would a novel about Slender Man be at all interesting enough to earn a decent rating? In this case, I discovered that it's because it was done really, really well.
But how on earth did it manage to do that?
Simply put, this book is hardly at all about Slender Man, but rather a character study told against the backdrop of a missing persons case, with a touch of speculative horror creeping in between the seams.
Told in an epistolary fashion for the 21st century, this is a collection of text messages, WhatsApp chats, police interrogation and phone recording transcripts, Reddit posts and messages, e-mails, and the occasional old-fashioned newspaper article, letter, and even in-novel fiction excerpt. This not only makes the events seem more three dimensional and "verified," but also like the events herein are so much more realistic for the modern technological age.
Seasoned horror fans will immediately spot and eat up any possible hints of what's going on, but the book never falls into heavily cliché- or trope-heavy territory. Instead, it elegantly continues to stay focused upon the matter at hand: someone has gone missing, and its moody protagonist is the only person who seems to be seeing the bigger picture at work.
Matt Barker is a deeply sympathetic and unhappy high school student, and as the strange events begin to unfold, it is his own harsh criticism and disbelief in them that make them seem all the more tangible and likely.
But again, why should a novel about Slender Man be at all interesting? He's completely fictional, and not some kind of long-standing urban legend that may have some truth to its existence. One can even find the exact website and time of day of his creation. It's the very problem that plagues (oof...pardon the pun) every zombie movie or book: they take place in worlds in which nobody has ever heard of zombies. Narratives like this are what lead to most Slender Man stories sounding exactly the same, like they were lifted off of, well, creepypasta posts.
So how does this book manage to avoid falling into that trap? It literally presents the fact that Slender Man IS a fictional entity. Matt and other characters literally discuss SM's origins on r/nosleep, and up through the bevy of stories that came in its wake, including Marble Hornets. It avoids the question of whether or not he's real, and doesn't ignore the supernatural with an ultimately mundane but still terrible splash of reality. Instead of asking "what if," it asks, "what now?"
There are many hidden winks to other horror writers throughout, but I must say that I was touched to see a Reddit username referencing the late and wonderful Jack Ketchum amidst them. The book was also highly reminiscent of T.E.D. Klein's brilliant novella "Black Man With a Horn," which itself also took a known fictional entity (H.P. Lovecraft's Tcho Tcho) and transposed it into a knowing writer's life as something more real than they thought it was - and like that novella, it did so in a convincing and inventive manner. Major Caitlín R. Kiernan and Paul Tremblay vibes ran throughout this one, as well, especially with their respective novels 'The Drowning Girl' and 'Disappearance At Devil's Rock.'
A final shout-out must be given to the great director Mike Flanagan, whose 2010 debut film 'Absentia' is, at least for me, unrivaled in the world of horror cinema. Long have I sought a book that matched the same hopeless, emotional, mysterious mood as that film, and this was the closest to that that I've yet experienced. If you know that film, you'll know the vibe - and this book deftly goes for exactly that vibe as well.
If anything, I'm only sad that the author of this book chose to remain anonymous for its publication, because much credit is due to whomever wove these words together. (Stephen Graham Jones, I'm looking at you...) But on the other hand, considering the perfectly fitting ending, which neatly ties a fancy bow upon the mystery by keeping it as authentic-feeling as possible, this book is so much stronger for its nameless presentation. It is what it is - and it worked, really, really well.