An Opus Alchymicum Vol 1: The Experimental Theologian's Apprentice

Hermione Granger lives content with her animal dæmon in the Oxford of another world, and Harry Potter is kept hidden by his parents in a subterranean Muggle city. But both of these worlds are shattered by a symbol-reader and a mysterious red stone, sending Harry and Hermione on journeys to witches, armoured bears and three-headed dogs, and towards a partnership that crosses worlds.