Skulduggery Pleasant, easily. Heck, half the time I don't remember what happens in the books, I just remember that the main character is a skeleton detective. That casts magic. And wears a suit.
That's all you need to know.
I'm pretty fond of the Scott Pilgrim books as well, but they're both a comic book and trumped by Skulduggery Pleasant.
EDIT:
In case a detective in a suit that casts magic and doesn't have skin is too epic for you to mentally image...
I usually don't like to use the phrase "badass", but I can't really think of anything better.
That's all you need to know.
I'm pretty fond of the Scott Pilgrim books as well, but they're both a comic book and trumped by Skulduggery Pleasant.
EDIT:
In case a detective in a suit that casts magic and doesn't have skin is too epic for you to mentally image...

I usually don't like to use the phrase "badass", but I can't really think of anything better.