- The first shared title for the book was The Copper Mask.
- An early cover design, as of September 2014, features Jasper deWinter along with Call, Tamara and Aaron.
- ↑ http://cassandraclare.tumblr.com/post/90391574799/books-books-books
- ↑ http://tmisource.com/2014/06/09/exclusive-interview-with-cassandra-clare/
- ↑ http://cassandraclare.tumblr.com/post/98164892374/you-guys-are-super-sweet-two-artists-worked-on
- ↑ http://cassandraclare.tumblr.com/post/100635292124/magisterium
Community content is available under CC-BY-SA unless otherwise noted.