The Worldwalker Trilogy is a series of fantasy/science-fiction novels by bestselling author, Josephine Angelini. The first book, Trial by Fire, follows Lily Proctor, a sickly girl who is transported to an alternate universe where magic is favored over science. However, Lily finds herself at odds with Lillian, her identical other self in this world, who is also the tyrannical ruler of Salem. Discovering that she is a witch, Lily must use her newfound power to fight a war that is brewing between the inhabitants of this world.
