Last Round Arthurs 4: The Weakest Knight & the Exceptional One
| Volume Title | Last Round Arthurs 4: The Weakest Knight & the Exceptional One |
| Japanese Volume Title | ラストラウンド・アーサーズ4 最弱の騎士と最も優れた騎士 |
| Light Novel | Last Round Arthurs: Scum Arthur and Heretic Merlin |
| Publisher | Fujimi Shobo |
| Light Novel Label | Fujimi Fantasia Bunko |
| Author | Tarou Hitsuji |
| Illustrator | Kiyotaka Haimura |
| Target Readership | Male |
| Volume | 4 |
| Release Date | August 20, 2019 |
| Pages | 360 |
| ISBN-10 | 4040731832 |
| ISBN-13 | 978-4040731834 |
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