In a world where shadow magic corrupts all it touches, Seraphina is the deadliest blade of the Sisterhood-an ancient order sworn to hunt the darkness.

When Lord Rivin Blackthorne's shadow cult threatens to spill corruption beyond his decaying kingdom, Seraphina is sent with a weapon more intimate than steel. The Raven's Kiss-a sacred venom that kills only at the height of pleasure and must be delivered by her lips alone.

Posing as Lady Sera Ravencrest, she infiltrates Luridian's elite society, drawing ever closer to her target. But as she weaves through Blackthorne's world of forbidden knowledge and seductive power, she discovers truths that shatter everything she was taught to believe.

Caught between her sacred vows and her treacherous heart, Seraphina must decide where her true loyalty lies. With the Sisterhood that shaped her, or with the gentle handmaiden who sees beyond her deadly facade to the woman beneath.

Some kisses bring death. Others awaken something far more dangerous.

Doubt