scientist from Will's world interested in "shadows" (or Dust in Lyra's world), travels to a land populated by strange sentient creatures called Mulefa. There, she comes to understand the true nature of Dust, which is both created by and nourishes life that has become self-aware. Lord Asriel and the reformed Mrs Coulter work to destroy the Authority's Regent Metatron. They succeed, but themselves suffer annihilation in the process by pulling Metatron into the abyss. The Authority himself dies of his own frailty when Will and Lyra free him from the crystal prison wherein Metatron had trapped him, able to do so because an attack by cliff-ghasts kills or drives away the prison's protectors. When Will and Lyra emerge from the land of the dead, they find their dæmons. The book ends with Will and Lyra falling in love but realising they cannot live together in the same world, because all windows – except one from the underworld to the world of the Mulefa – must be closed to prevent the loss of Dust, because with every window opening, a Spectre would be created and that means Will must never use the knife again. They must also be apart because both of them can only live full lives in their native worlds. During the return, Mary Malone learns how to see her own dæmon, who takes the form of a black Alpine chough. Lyra loses her ability to intuitively read the alethiometer and determines to learn how to use her conscious mind to achieve the same effect. Characters All humans in Lyra's world, including witches, have a dæmon. It is the physical manifestation of a person's 'inner being', soul or spirit. It takes the form of a creature (moth, bird, dog, monkey, snake, etc.) and is usually the opposite sex to its human counterpart. The dæmons of children have the ability to change form - from one creature to another - but during a child's puberty, their dæmon "settles" into a permanent form, which reflects the person's personality. When a person dies, the dæmon dies too. Armoured bears, cliff ghasts, and other creatures do not have dæmons. An armoured bear's armour is his soul. Lyra Belacqua, a wild 12-year-old girl, has grown up in the fictional Jordan College, Oxford. She is skinny, with dark blonde hair and blue eyes. She prides herself on her capacity for mischief, especially her ability to