The Mask of Loki (1990) is an epic science fantasy novel by American writers Roger Zelazny and Thomas T. Thomas, detailing a centuries long struggle between the avatars of Loki and Ahriman.
 Dust-jacket illustration from the first edition | |
| Author | Roger Zelazny and Thomas T. Thomas |
|---|---|
| Cover artist | Gary Ruddell |
| Language | English |
| Genre | Science fantasy |
| Publisher | Baen |
Publication date | November 1990 |
| Publication place | United States |
| Media type | Print (Hardback) |
| Pages | 340 pp |
| ISBN | 0-671-72021-X |