The Alpha's Debt (Forbidden Fates Book One)

"You think you know everything, Kasia, but you are clueless." Carver growls at me, his large hand clamps around my throat and my back meets the bed. "You can't imagine what you'll be begging for one day. What I will deny you, until you get on those knees...and plead for all of me like the good sl*t I know you can be."

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Kaisa has spent over fives years under her fathers thumb, and thought she'd finally been given a way out.
Fives years ago there was an attack on the Northern Dark Waters pack that left over half of their population dead, along with the standing Luna and future Alpha. To...assist the pack in getting back on their feet in the North, her father takes the highest bid and ships her off within a day to no other than the cruelest Alpha in the South.
Carver King.
Upon arrival she believes she has everything figured out about the pack and the man who presence sets her on fire, until Kasia learns of a late night deal made between her dead brother and the male who purchased her.
Why did her sibling never mention his ties to the Alpha, and what exactly is this about a debt?!