The Songbird & the Heart of Stone

Why these tropes fit

A doomed vampire heroine sentenced for murder is forced into a quest to the underworld alongside a scarred, brutalized bastard prince whose mission she has secretly been commanded to sabotage. Her devotion to a sun god sets up a love triangle as her forbidden bond with the brooding Asar grows, layering betrayal, angst, and morally gray choices over an epic, treachery-soaked journey through trials and vengeful ghosts.

Evidence from the source

• Vampire Romance: “Mische lost everything when she was forcibly Turned into a vampire” source
• Betrayal: “commands her to help Asar in his mission, only to betray him” source
• Forbidden Love: “forbidden attraction to Asar, a burgeoning bond that risks invoking the wrath of gods” source
• Quest: “a journey to the underworld to resurrect the god of death” source
• Forced Proximity: “she's forced into a mission worse than execution” source
• Tortured Hero: “Asar, the bastard prince of the House of Shadow with a past as brutal as his scars” source
• High Fantasy: “epic fantasy romance of love and treachery between mortals and gods” source
• Dark Romance: “the alluring call of the darkness-and her forbidden attraction to Asar” source

Metadata source: Google Books. Quotes are used only to verify the tags.