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Light Novel Volume 7 has been scheduled for July 29, 2022!

• Official English Light Novel Volume 5 will release on July 21, 2022 You can buy the book at here!

• Official English Manga Volume 3 will release on August 12, 2022 You can buy the book at here!


The World's Finest Assassin Wiki

Light Novel Volume 1 is the first volume of the Sekai Saikō no Ansatsusha, Isekai Kizoku ni Tensei suru Light Novel. It is written by Tsukiyo Rui with illustrations by Reia.


I’m going to live for myself!

The greatest assassin on Earth knew only how to live as a tool for his employers—until they stopped letting him live. Reborn by the grace of a goddess into a world of swords and sorcery, he's offered a chance to do things differently this time around, but there's a catch...He has to eliminate a super-powerful hero who will bring about the end of the world unless he is stopped. Now known as Lugh Tuatha Dé, the master assassin certainly has his hands full, particularly because of all the beautiful girls who constantly surround him. Lugh may have been an incomparable killer, but how will he fare against foes with powerful magic?


  • Prologue. The Assassin Reincarnates
  • Chapter 1. The Assassin Chooses His Skills
  • Chapter 2. The Assassin Learns the Family Creed
  • Chapter 3. The Assassin Gets His Eyes
  • Chapter 4. The Assassin Studies Magic
  • Chapter 5. The Assassin Learns Spells
  • Chapter 6. The Assassin Creates New Magic
  • Chapter 7. The Assassin Utilizes Knowledge from His Previous World
  • Chapter 8. The Assassin Promises to Meet Again
  • Chapter 9. The Assassin Finds an Assistant
  • Chapter 10. The Assassin Receives a Test
  • Chapter 11. The Assassin Receives His Final Trial
  • Chapter 12. The Assassin Departs
  • Chapter 13. The Assassin Becomes a Merchant
  • Chapter 14. The Assassin's Little Sister
  • Chapter 15. The Assassin's New Product
  • Chapter 16. The Assassin Achieves Success
  • Interlude. The Goddess's Guidance and a Fated Encounter
  • Chapter 17. The Assassin Returns Home
  • Chapter 18. The Assassin Gathers Information
  • Chapter 19. The Assassin's First Assassination
  • Chapter 20. The Assassin Makes a Decision
  • Chapter 21. The Assassin Makes Haste
  • Chapter 22. The Assassin Runs to His Princess
  • Chapter 23. The Assassin Releases the God Spear
  • Epilogue. How Lugh Tuatha Dé Chooses to Live

Adaptation Notes



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Volume 1Volume 2Volume 3Volume 4Volume 5Volume 6