Bitter Burn (Lyonesse #3)

Bitter Burn (Lyonesse #3) by Sierra Simone is out now since September 30, 2025.

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Bitter Burn (Lyonesse #3) Release Date: September 30, 2025

Published

MMF spice meets a tangled, high-stakes quest for vengeance in the unforgettable final book in the Lyonesse trilogy by USA Today bestselling author Sierra Simone.

I think it’s important that you know this about me, that you understand this: I’m not sorry. I’d do it again. 

After Mark Trevena’s husband died eight years ago, he made vengeance his only purpose, his religion, his destiny. But to get to his enemy, he had to make himself like his enemy. Mortimer Cashel had a kingdom of secrets? Then Mark would make an empire. Mortimer Cashel had blood on his hands? Then Mark would bathe in it.

But Tristan and Isolde changed everything. Mark hadn’t counted on wanting them, needing them; he hadn’t counted on how it felt to watch the two of them fall in love. He’d thought he had everything under control―he’d thought he was safe from his own long-dead heart. He’d never imagined that the wronged husband, the jealous king from his childhood fairy tales, would be played by none other than himself.

It no longer matters what he used to believe. His enemy is ready to finish the game, and for the first time in eight years, Mark has pieces on the board he can’t afford to lose. He’ll burn the entire world to keep Tristan and Isolde safe. He’ll scorch the earth―but as any good assassin will tell you, fire will only get a man so far, because there’s always something left in the ashes. And for Tristan and Isolde, what’s left in the ashes is the cold, bitter bones of the truth: their story begins and ends with Mark.

And every story needs a villain…

Delicious tropes:

  • MMF romance
  • High heat
  • Retelling of Tristan & Isolde
  • “Touch them and die”
  • Political intrigue
  • Obsessive villain MMC
  • All-consuming emotions

Praise for Sierra Simone:

“A devastating tour de force. Magnetic, achingly sexy, and pouty passionate perfection. Five stars aren’t enough.” ― New York Times bestselling author K.A. Linde, for Salt Kiss

“Sierra Simone has me by the heart. Tristan, Mark and Isolde have shattered it and left me strung out for the next book while I pick up the shattered pieces. Every word is dripping with dark, twisty emotions, heartbreaking longing and visceral need. The kind of words that only Sierra Simone can write.” ― USA Today and WSJ Bestselling Author Nana Malone, for Salt Kiss

“Hot as sin.” ― New York Times bestselling author Lauren Blakely, for Priest

“A masterful probing of faith, love, sex, and grief from an author who understands that to be truly human is to find the divine in the most unexpected of places.” ― Entertainment Weekly, for Sinner

“I was rapt. I was challenged. I was DEBAUCHED, and devoured every minute of it.” ―New York Times bestselling author Kennedy Ryan, for Saint

Reader Anticipation Rating:
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Genre: Dark Romance, LGBTQ+

Sierra Simone

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Book Club Journal: Reading Log For Adults & Kids Who Love Books!
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