| Ja Kanji: | 聖闘士星矢 ギガントマキア |
| Ja Romaji: | Seinto Seiya Gigantomakia |
| Creator: | Masami Kurumada |
| Type: | novel series |
| Author: | Tatsuya Hamazaki |
| Illustrator: | Shingo Araki |
| Publisher: | Shueisha |
| Demographic: | Male |
| Imprint: | Jump J-Books |
| First: | August 23, 2002 |
| Last: | December 16, 2002 |
| Volumes: | 2 |
is a Japanese novel series written by Tatsuya Hamazaki and illustrated by Shingo Araki. It is a spin-off to the Saint Seiya manga series by Masami Kurumada. Two novels were released by Shueisha, under their Jump J-Books light novel imprint, in August and December 2002.
In the early days of mythology, the goddess Athena, with the support of her Saints, waged countless wars to protect love and justice in the world, and in one of these battles they faced fearsome adversaries known as Gigas, who followed to the god Typhon. At the end of that terrible war, Typhon and the Gigas were finally defeated and sealed under Mount Etna in Sicily.
The Giants have returned with a single goal, to spread blood and death, making it known to their ancient enemy, Athena. These ancient beings wear a solid cloth called Adamas (which is usually as solid and hard as diamond itself) and to achieve their plans they first need to resurrect Typhon, their king.
The Sicily Island is a place where one of the hundred sons of Mitsumasa Kido was sent to train years ago, destined like his stepbrothers to become a Saint. A young man was called Mei, who stayed longer than expected in his training place, and the cloth of Coma that he's wearing doesn't belong to any of the ranks of Athena's army (bronze, silver or gold).