Phi no Houseki -Karano Mahoroba Maseki Kitan-
| Volume Title | Phi no Houseki -Karano Mahoroba Maseki Kitan- |
| Japanese Volume Title | φの方石 (3) ―骸のまほろば魔石奇譚― |
| Light Novel | Phi no Houseki |
| Publisher | ASCII Media Works |
| Light Novel Label | Media Works Bunko |
| Author | Shuusuke Niita |
| Volume | 3 |
| Release Date | May 25, 2016 |
| Pages | 290 |
| ISBN-10 | 4048921266 |
| ISBN-13 | 978-4048921268 |
| Height (cm) | 15.20 |
| Width (cm) | 11.00 |
| Thickness (cm) | 1.60 |
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