In a closed urban fantasy, the magical world is secret and no one knows about it. In an open urban fantasy, everyone knows about it. So with a closed fantasy, you have to figure out how the world keeps itself secret, and with an open one, you have to figure out how knowledge of magic has altered the world we know.
Cassandra ClareI'll take Shadowhunter, then. Because from what I've experienced of vampires, you mostly suck. No pun intended.
Cassandra ClareScrew the Silent Brothers." "No thanks. There's strong and silent, and then there's just freaky." "Isabelle!
Cassandra Clare