The Salt-Black Tree by Lilith Saintcrow

What happens when you find a way to save your loved one… but the price might not be worth it—the stunning conclusion to New York Times bestseller Lilith Saintcrow’s The Dead God’s Heart

Nat Drozdova has crossed half the continent in search of the stolen Dead God’s Heart, the only thing powerful enough to trade for her beautiful, voracious, dying mother’s life. Yet now she knows the secret of her own birth—and that she’s been lied to all her young life.
The road to the Heart ends at the Salt-Black Tree, but to find it Nat must pay a deadly price. Pursued by mouthless shadows hungry for the blood of new divinity as well as the razor-wielding god of thieves, Nat is on her own. Her journey leads through a wilderness of gods old and new, across a country as restless as its mortal inhabitants, and it’s too late to back out now.

Blood may not always prevail. Magic might not always work. And the young Drozdova is faced with an impossible choice: Save her mother’s very existence…
…or accept the consequences of her own.