Hammer of The Witch (Repeating History #2)

History isn't dead when you're living it
Ash and Grant are about to learn why it was called the Dark Ages, when Merlin, in the guise of their teacher, once again sends them time traveling to reclaim one of the antiquities their prank destroyed: a book called the Malleus Maleficarum, or Hammer of the Witches, which was used to persecute and kill innocent people throughout medieval Europe.
They'll need to keep their heads down and their wits about them in a Germany ruled by the iron fist of the Inquisition, where anyone who is different is dragged off to horrifying prisons, tortured to confession, and ultimately killed in the worst way imaginable. But it won't be easy to navigate a frightening and brutal time, secure Merlin's book, and make it home without attracting attention.