Complex sentence: In the novel "Abhorsen", Lirael, Mogget, the Disreputable Dog, and Prince Sameth encounter Astarael in a strange underground area where the Charter is not present and the border between Life and Death blurs.
Split into simpler sentences: In the novel "Abhorsen", Lirael, Mogget, the Disreputable Dog, and Prince Sameth encounter Astarael in a strange underground area. In Astarael's presence, the Charter is not present and the border between Life and Death blurs.