The Last Shield

A gender-flipped Die Hard set in a mysterious castle, Cameron Johnston's The Last Shield is an engaging fantasy read, perfect for fans of John Gwynne and Mark Lawrence.
The ancient forest realm of Sunweald is bordered on two sides by far mightier nations – a precarious situation. At its centre, the Sunweald Palace is home to the Lord Regent and the heir to the throne, together with numerous precious and powerful artefacts. The Palace is protected by the realm's elite Shields, dedicated to guarding the royal line against all foes.
A group of vicious brigands called the Wildwood Reivers have been stealing arcane artefacts and smuggling them across the borders, out of Sunweald. And the objects they most desire are stored in the mystical Wyrm Vault, hidden away deep in the bones of the earth, within the walls of the Palace itself.
As political and religious tensions mount, Sunweald's druids prepare to enact rituals for the Summer Solstice...