<Tr> <Th> Preceded by </Th> <Td> City of Ashes </Td> </Tr> <Tr> <Th> Followed by </Th> <Td> City of Fallen Angels </Td> </Tr> <P> City of Glass is the third book in The Mortal Instruments series, an urban fantasy series set in New York written by Cassandra Clare . It was originally published in the United States in hardcover on March 24, 2009 . </P> <Table> <Tr> <Td> </Td> <Td> This article's plot summary may be too long or excessively detailed . Please help improve it by removing unnecessary details and making it more concise . (November 2013) (Learn how and when to remove this template message) </Td> </Tr> </Table>

When does sebastian show up in the mortal instruments