As usual, I'm leaving the plot details up to previous reviewers, amazon, and your own web browsing (others are much better at these things than I, anyway!).
In the past, I had enjoyed Otsuichi's other Tokyopop released novel, "Calling You". In that book, the author reached out to his readers with stories that, although simplistic in prose and construction, were heartrending and chilling. The three pieces of that novel, although possessing shocking twists, I would ultimately consider to be "dramas" (if I had to label them).
With Goth, Otsuichi has moved into a more solidly labeled mystery/horror genre. Once again, as with "Calling You", the material that makes up his stories is laid out with a brutal honesty which can push readers into an uncomfortable zone (I'm referring mostly to "Kids", from the other novel, with this reference).
Goth switches between a first and third person narrative. As I mentioned before, Otsuichi's writing style (in regard to prose) is somewhat simplistic. You won't find overly decorative descriptions or extravagant dialogue. However, that is not to say the writing is dry nor uncreative. On the contrary, when a scene is described, it feels like you're standing there and witnessing the story beyond the page. Analogies and similes, when used, are clever and memorable.
This writing style often gives the story an effortless sensation, as if the events that unfold are done so with sincerity and without emotional complication. The result? A novel that, regardless of how improbably or fantastic it is in some ways, feels terrifyingly realistic. Otsuichi doesn't give you a chance to remember that what you're reading is fiction. Events and people are described "as is", with a blood chilling indifference that pushes home the monstrosity of the crimes that are committed.
And yet, amidst all of this worn-on-the-sleeve writing, you have more than a fair share of complex issues and character motives to consider. By the end, I no longer always knew who I was sympathizing with or what I should be rooting for.
Finally, perhaps my lack of experience with mystery novels and movies is to blame (or I'm just gullible), but there were at least three stories that made my jaw flat out drop. At times it feels like everything is being spelled out for you, then wham!
Sum up of it: Recommended to horror fans who like some plot twists and intrigue mixed in with their gore. Also, if you're a fan of Dexter (the TV series), this might really hit it off with you, too.