When Malcolm finds a secret message inquiring about a dangerous substance called Dust, he finds himself embroiled in a tale of intrigue featuring enforcement agents from the Magisterium, a woman with an evil monkey daemon, and a baby named Lyra.

"The windows between the many worlds have been sealed and the momentous adventures of Lyra Silvertongue's youth are long behind her--or so she thought. Lyra is now a twenty-year-old undergraduate at St. Sophia's College and intrigue is swirling around her once more. Her daemon Pantalaimon is witness to a brutal murder, and the dying man entrusts them with secrets that carry echoes from their past. The more Lyra is drawn into these mysteries, the less...

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.