Editing His Dark Materials (section)

===''The Amber Spyglass''===
{{Main|The Amber Spyglass}}

At the beginning of ''The Amber Spyglass,'' Lyra has been kidnapped by her mother, [[Marisa Coulter|Mrs Coulter]], an agent of the Magisterium who has learned of the prophecy identifying Lyra as the next [[Adam and Eve|Eve]]. A pair of angels, Balthamos and Baruch, tell Will that he must travel with them to give the Subtle Knife to Lyra's father, [[Lord Asriel]], as a weapon against [[Authority (His Dark Materials)|The Authority]]. Will ignores the angels; with the help of a local girl named Ama, the [[List of His Dark Materials and The Book of Dust characters#Iorek Byrnison|Bear King Iorek Byrnison]], and [[Lord Asriel]]'s [[Gallivespian]] spies, the [[Chevalier Tialys]] and the [[Lady Salmakia]], he rescues Lyra from the cave where her mother has hidden her from the Magisterium, which has become determined to kill her before she yields to temptation and sin like the original Eve.

Will, Lyra, Tialys and Salmakia journey to the Land of the Dead, temporarily parting with their [[dæmon (His Dark Materials)|dæmons]] to release the ghosts from their captivity. [[Mary Malone]], a scientist from Will's world interested in "shadows" (or [[Dust (His Dark Materials)|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 [[Races and creatures in His Dark Materials#Cliff-ghasts and night-ghasts|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.