Tear Jerker / The Bartimaeus Trilogy

• Really, everything about Bartimaeus' relationship with Ptolemy.
  "It's two thousand, one hundred and twenty-nine years since Ptolemy died. He was fourteen. Eight world empires have risen up and fallen away since that day, and I still carry his face. Who do you think's the lucky one?"
• Faquarl's demise is surprisingly sad. After so much rage, after sacrificing the possibility to return to the Other Side in order to his revolt against the magicians for all their millennia of slavery, he learns from Bartimaeus and Nathaniel than another type of relationship between magicians and spirits was possible all along.
  • Bartimaeus digs it deeper by pointing out that Faquarl's desire for vengeance is a purpose, a human concept alien to djinni, meaning Faquarl unwittingly turned into the very thing he wanted to destroy. By acquiring a purpose of revenge, Faquarl has unwittingly done to himself what he accuses humans of doing to spirits - enslaving them to a purpose, something djinni don't naturally have.
• The death of Nathaniel at the end.
  Kitty: [speaking at the ruins where Nathaniel died] So much for your promises.