She found the bodies. The Headmaster smiled and gave her a pardon. Scarlett uncovered the worst secret in Obsidian Marrow Academy and lived. Now Malakor — three-thousand-year-old Lich, institutional monster, and the calmest creature she's ever wanted to destroy — has told her to continue her studies. She knows what that means. She's not forgiven. She's being watched.

The void inside her is getting hungrier, and the only thing keeping it from swallowing her whole is the three of them. Draven, whose shadows settle around her like a second skin. Lysander, whose ice cracks every time he touches her. And Syth — ancient, patient, woven into the mountain itself — who has been holding the walls together for a thousand years and has decided she's worth holding too.

But Malakor isn't afraid of what she found. He's been waiting for what she's becoming. And the tithe he's been collecting from every student who ever swore the Iron Vow is about to come due.

The void remembers what was taken. So does she.

Tithe of the Sovereign is Book 2 of The Iron Vow Society, a dark fantasy romance series featuring a why-choose/reverse harem with three morally grey love interests, a heroine who bites back, and explicit content. This book ends with an HFN and a series-arc cliffhanger.