A simmering supernatural romance set in the crumbling Italian city of Castello, where mafia clans make the rules, dark magic pulses the streets and the sins of the past threaten to consume the present.

When sixteen-year-old Lilly arrives in Castello, she isn't impressed.

A secluded town in the Italian mountains is not where she saw her last years of high school playing out. Divided for generations by a brutal clan-family war, the two halves of Castello are kept from destroying each other by the mysterious General, a leader determined to maintain order and 'purity'. . . whatever the cost.

Lilly falls in with the rebellious Liza, brooding Nico and sensitive Christian, and sparks begin to fly. But in a city where love can lead to ruin, Lilly isn't sure she can trust anyone -- not even herself.

And then she accidentally breaks Castello's most important rule: when the General's men come to test your blood, you'd better not be anything more than human...

In one act of flame and fury, Lilly Deluca plunged the city of Castello into a brutal civil war and was stripped of her own Saintly power in the process. Now, she's wanted by opposing clans, and must fight to stay ahead of her pursuers while keeping herself and Christian, the boy she loves, alive.

With the war closing in , Lily teams up with Nico, the beautiful boy from the rival mafia family, to uncover the truth about Castello’s dark heart. But as the conflict escalates and her connection to Nico intensifies, Lilly is forced to make a choice: break her own heart, or let Castello fall.

Equal parts thrilling and devastating, this YA romantasy is the epic conclusion to the With Fire In Their Blood duology.