In the Woods is a fairly long book (over four hundred pages), and it deals with some disturbing subject matter—murder, rape, kids disappearing, parents naming their children after Britney Spears and Justin Timberlake—but it's easy to follow. It's told from the point of view of a detective on the Dublin Murder Squad, and he's more than happy to walk you through his train of thought on the case.
Plus, Rob, our narrator, went to school in England to eliminate his Irish accent, so while In the Woods may be set in Ireland, it doesn't feel Irish. Characters don't speak with thick accents, forcing you to wade through indecipherable dialect.
So what we have is a stay-up-until-two-in-the-morning page-turner and a literary thriller. In the Woods is the best of both worlds—like the Ben and Jerry's Cookies and Milk ice cream of the fiction universe.