Bøger i La Materia Oscura/ His Dark Ma serien

As the boundaries between worlds begin to dissolve, Lyra and her daemon help Will Parry in his search for his father and for a powerful, magical knife. Will acaba de matar a un hombre. Es un fugitivo. Su huida lo llevarâa mucho mâas allâa de su propio mundo, al sobrecogedor desasosiego de una ciudad desierta, y a conocer a una niäna, Lyra. El destino de esta se halla extraänamente ligado al suyo y juntos deben encontrar el arma mâas poderosa de todos los mundos...

Accompanied by her daemon, Lyra Belacqua sets out to prevent her best friend and other kidnapped children from becoming the subject of gruesome experiments in the Far North.

Lyra and Will find themselves at the center of a battle between the forces of the Authority and those gathered by Lyra's father, Lord Asriel.