Her Dark Wings By Melinda Salisbury

(New,  paperback)
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The great love of Corey’s life has always been her best friend, Bree: closer than sisters, their bond is unbreakable. 
Or so Corey believes, until Bree betrays her, and Corey’s world is shattered. 
Corey finds herself heartbroken, furious and alone... 
Only to discover that the Underworld – and Hades, Lord of the Dead – is closer than she thinks...