The Gravest Girl of All — Amy Cross

The final reckoning is at hand. Ancient prophecies are about to be unleashed. And Sam Marker hasn't even had her first cup of tea this morning. Having tried several times to acquire the Devil's body by other means, the evil Abberoth finally decides to do the job himself. Heading to Rippon, he immediately unleashes pain and torture upon the local population. Soon Rippon is cut off from the rest of the world, and it's a world that might not last much longer if Abberoth doesn't get what it wants. Soon, Sam is thrust into a fight to save not only Rippon, but also the entire planet. All she has by her side is a ghost, a stone angel, a pile of books... and maybe, if she's particularly unlucky, the Devil himself. The Gravest Girl of All is the third book in the Grave Girl series.