The Fire OathPaperback, 26 September 2023

In the fourth installment of the action-packed Guardians of Horsa graphic novel series, the Guardians venture to the Fire Realm.

The Guardians seek a hidden relic inside the Fire Realm, but there's no warm welcome waiting. Instead, the horses learn of the Fire Oath, a promise Gamma Ray made as prince of the Solar Herd to protect his realm at all costs...even turning against the Guardians.