The Meaning of Night by Michael Cox
I'm completely and utterly enthralled by this book. If you haven't read it, and you enjoy modern renditions of Victorian thrillers, you must read it. The narrator is completely psychotic. It won't spoil the story telling you he commits a "practice" murder at the beginning of the book, in order to perform the murder he plans to commit later. And he thinks he wasn't seen … I love books with insane main characters. What that says about me I won't delve into.
I hate when reviewers say a book is gripping. Could that be more over-used? Isn't every good book gripping? But this one is, well … gripping. Unputdownable. Insert other oft-used reviewer descriptor here.
It's just damn good.