Shadowhunter's Codex: Sneak Peek #4 - Equipment and Sensors 

"The Shadowhunter’s Codex by Cassandra Clare & Joshua Lewis will be in stores on October 29th & we’ll be giving you exclusive sneak peeks at Clary’s edition of the Codex right here!" via. simonteen.tumblr
Keywords: the mortal instruments, cassandra clare, shadowhunters codex, sneak peeks, tumblr, 2013, ♥, link