The Mortal Instruments books are SO good. But the parentage/brother-sister thing is confusing. Jace isn't her brother, then he is, then he isn't, then it's someone else under the fake name Sebastian, and then he's part demon, and then Jace and Clary have angel blood, and Simon's a vampire, and then he's a Daylighter, and then Jace goes through four last names before he FINALLY settles on Herondale, and now I'm going to go pitch myself off Niagra Falls, yay.