Ria's Blood Debt - Ria Miller and the Monsters, #4

ALL DEBTS COME DUE. For more than five years, my parents and I have risked it all hunting monsters. Every monster we've faced, every chance we've taken, it's all been one big gamble. We've been lucky so far. But our luck is about to run out. Because when an old friend of my fathers comes looking for help, it sets off a chain of events that no one could have seen coming. And all those gambles we've taken? They're finally coming back to haunt us.
The endgame is coming. I only hope we all make it there.