Title: Green Jack
Author: Alyxandra Harvey
Publisher: Self Published
Publication Date: June 2016
Synopsis from Goodreads
What do Saffron, a scavenger from the Core, and Jane, an Oracle at the Collegium have in common?
The Directorate–and the dangerous magic of a Green Jack’s leaf mask,
And the Directorate may control both science and magic, but they can’t control everything.