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 ClareWe cant go around picking up every pile of dust in the place just in case it turns out to be Gregor in the morning." -Pg.242-
Cassandra Claremolesting the vampire while he's too weak to fight back, iz? jace asked. i'm pretty sure that violates at least one of the accords.
Cassandra Clare