Assassin King: Blood for Blood

Assassin William emerges from hiding after his sister Annie dies from bullying.

William, known as the world's deadliest assassin, erased his existence to secure a peaceful life for his only sister Annie under a loyal ally's protection. That sanctuary collapsed when the ally's daughter, consumed by envy, subjected Annie to relentless torment. The abuse drove Annie to leap from a balcony during her own coming-of-age celebration while William watched helplessly. The sight shattered his restraint and awakened a dormant fury. Now the Assassin King has resurfaced, hunting those responsible for his sister's death.

• action
• revenge
• thriller

1. William hid his assassin identity to protect Annie
2. Ally's jealous daughter bullied Annie relentlessly
3. Annie jumped from balcony at her banquet

Readers who want a ruthless protagonist unleashing lethal retribution for a murdered sibling.