This is the third of the recent group of classic romance/horror humor mash-ups I've read and it is the very best of them. It succeeds in being a fun, light read because it avoided the traps of the almost-good "Pride & Prejudice & Zombies" and the waste of paper and time that was "Sense & Sensibility & Sea-monsters". No cheap jokes, no junior high sex puns, no glaring and stupid mistakes in the additions, no missed opportunities, and no pointless, tedious grafting onto the original story. The humor is dry, understated, and dovetailed nicely with the original voice of the main character.
That Ms. Erwin not only has read Jane Eyre, but understood and appreciated it, was apparent in her handling of the original material. (I think part of that understanding and intelligence is indicated by the proper spelling of her first name). She maintained qualities of the original characters and, while indicating the humor of the new situations in which she placed them, she never ridiculed or insulted them (I particularly liked her transformation of Mr. Brocklehurst -- it was everything I could desire). I didn't have a single eye rolling moment and my curiosity about how the story would develop and end remained high until the last few pages answered all.
I've read Jane Eyre several times since my first foray in 6th grade. When I first read about this book, I speculated that the Brontes might be better suited for such a mash-up. Their writings are much more emotional, excessive, and interwoven with Byronic Romanticism and Gothic motifs. These made room for adding in the changes without overstretching credulity (not the case with the two Austen mash-ups, which required much subtler humor and, being tighter and less prone to emotional broad strokes, had less room for what was sledged into them.)
Quite a good, fun, light summer read.