In cased you missed it yesterday, Cassandra Clare has posted a teaser on Tumblr to the next installment of The Mortal Intruments series, City of Lost Souls:

Clary shook her head. “There’s more to honesty than … than an arrangement of words. They say faeries can’t lie, but you lie in your intentions, your attitude, your demeanor —”
“And humans do not?” The Queen’s gaze slid across Clary and Simon. “This vampire, this Daylighter you bring everywhere with you — he is the one whose kiss you did not desire, here in my Court, is he not? Do you care for him at all, or is only the Mark of God on him that causes you to bring him with you, like a shield? And you,” she added, turning to Simon, “you who loved her, now you lend your not inconsiderable power to the project of finding the one she loves more? Where is the advantage to you?”
Simon cleared his throat. “Perhaps that is the difference between my kind and yours,” he said. “Sometimes we do things that aren’t to our advantage.”
“Ah,” said the Queen. “Stupidity, you mean.”
“I wouldn’t call it that.” Clary couldn’t help being impressed — the last time they had been here Simon had been too uncomfortable and out of his depth to say more than a few words; now he was holding his ground. “Now, do you want the ___ or not? We have business to attend to.”
“I could take it from you,” said the Queen. “The girl will not be difficult to dispose of, and as for you, Daylighter, those who serve me serve with their lives. A suicide rush could greatly inconvenience you, despite your curse.” She ran her eyes over him lingeringly.
“I am the adopted daughter of Council member Lucian Graymark,” said Clary. “I am close with the Lightwoods of the Insititute. Is it worth earning their wrath and ire just to revenge yourself upon me for tricking you? Besides — I’ve always heard that faeries appreciated cleverness. You wouldn’t want it said that you can’t appreciate a good trick, even at your own expense, would you?”
Clary saw by the narrowing of the Queen’s eyes that she had gambled hard — maybe too hard — on the faerie woman’s pride; but a moment later, the Queen was smiling, and the creatures in the walls shrieked appreciatively. “Tricky like your father,” she said, and Clary felt it like a kick in the stomach. “Very well. What would you like of me in return for the ___? I shall decide if your proposal merits a negotiation.”

Are you excited yet?