Plot

Kate, Emma, and Michael are siblings shifted from one orphanage to another over their lifetimes. Kate, the eldest, remembers that, ten years ago on Christmas Eve, her mother had made her promise to protect her siblings, and in turn promised the family's reunion. After their rejection by a prospective adoptive mother, the children’s current residence (called the Edgar Allan Poe Home for Incorrigible and Hopeless Orphans) sends them to a mansion situated in Cambridge Falls. There, they are introduced to its owner, Dr. Stanislaus Pym, and explore the house. In the basement, a door appears before them, and they discover an emerald-coloredbook containing no text. When an old photograph is touched to a page of the open book, the children are teleported to the date and location on which the photograph was taken. There, the children observe a witch, titled the Countess, vowing to kill a child every week until the enslaved fathers of the children find what she seeks. The Countess notices the three orphans and calls upon her grotesque henchmen, designated Screechers, to capture them. Kate and Emma escape, but Michael is accidentally left behind, and his sisters return to save him; but lose the book (the eponymous 'Emerald Atlas'). In escape, they are hunted by wolves; meet someone named Gabriel; and enter a subterranean maze, where Kate and Michael are captured by Dwarves. There, they discover a fifteen-years-younger Dr. Pym, with whom they recover the Emerald Atlas. Upon finding it, Kate is drawn into an earlier time, where she again meets Dr. Pym, and thence returns to the time she most-recently left. Emma, having tarried with Gabriel to repel the Countess’s followers, is shot with a poisonous arrow, but is saved by Gabriel’s wisewoman, Granny Peet. Once healed, Emma, backed by the wisewoman, sways the townsfolk into war against the Countess. After their victory, the witch herself remains to be conquered, and holds the imprisoned children on a boat. Kate, now 'chosen' by the Atlas, can travel to any time while in possession of it; but in exchange for the local children's lives, surrenders it. The Countess seizes the book; but is punished by her master, the Dire Magnus, who reveals that Kate and her siblings are the Atlas's and the two other books of beginning's rightful owners until, upon the completion of a prophecy, he claims it. Dr. Pym saves some of the local children; others are saved by Kate. She and her siblings return to their own time, where Kate is approached by the Countess. Using the Atlas, Kate drags the Countess into Rhakotis during its conquest by Alexander the Great. In plea, the Countess tells Kate that her mother and father are captives of the Dire Magnus, as bait to lure the siblings into retrieving the Books of Beginning (a trio of volumes enabling command over reality, of which the Atlas is the first) in exchange for their parents’ release. Kate then leaves her in Rhakotis and returns to her own time, where Dr. Pym explains the Books.