I have a soft spot for the Mignola-verse, and this one flew under my radar until I picked it up from the library. Really fun read and more interesting than I thought it would be. I kind of want to say that Frankenstein here is a sort-of-Hellboy, and he sort of is. But then, also isn't.

I don't know if there's an earlier book or not. If not, I enjoyed how this one sort of jumps back and forth in time giving context, but not all the context. If there is an earlier book, then I guess it probably makes more sense - BUT, it was still pretty easy to follow without having read anything else.