Fall of Night by Tyffany Hackett

She’s falling apart. He’ll do anything to put her together again.

After a brutal shifter attack, Nathra City’s Fae are driven underground, forced to become fugitives. To save them, Reagan, Tarik, and their rebellion friends embark on a mission to the Fae realm. But finding allies might be harder than they thought.
While Reagan continues to struggle with guilt and nightmares from the attack, Tarik must set aside vengeance to keep everyone alive.
None of them are equipped to face the unknown challenges on this perilous journey. And the more they fight to stay together, the more fate seems determined to tear them apart.