A Heart of Midnight by Jenna Wolfhart

The Battle for the Crown is over, and the time has finally come for Taveon to take his rightful place on the throne. But nothing is ever simple in the Dark Fae realm.
A strange and twisted curse befalls the Court, assassins lurk behind every corner, and a dangerous new shapeshifter has joined the Academy, an alluring male who either wants me dead or in his bed.
Maybe both.
With the entire Court under siege, it is up to me to find the cure to the curse. If I don’t, the entire realm will fall into chaos. And I’ll never see Rafe or Taveon again.