Circlet Girl 9
| Volume Title | Circlet Girl 9 |
| Japanese Volume Title | 円環少女 9 公館陥落 |
| Light Novel | Circlet Girl |
| Publisher | Kadokawa Shoten |
| Light Novel Label | Kadokawa Sneaker Bunko |
| Author | Satoshi Hase |
| Illustrator | Miyuu |
| Target Readership | Male |
| Volume | 9 |
| Release Date | November 29, 2008 |
| Pages | 318 |
| ISBN-10 | 4044267111 |
| ISBN-13 | 978-4044267117 |
| Height (cm) | 14.80 |
| Width (cm) | 10.60 |
| Thickness (cm) | 1.60 |
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