For years, Jacob Reckless has used a mirror in his father’s abandoned study to escape into a world where the folklore of the Brothers Grimm is not mere fiction, but a visceral and often lethal reality. In this Mirrorworld, Jacob has built a reputation as a preeminent treasure hunter, a man who navigates the shifting alliances of fairies, dwarves, and emperors to retrieve enchanted artifacts. His life is defined by a sharp binary: the mundane grief of the modern world, where his father vanished and his mother withered away, and the adrenaline-fueled sanctuary behind the glass where he can be whoever he chooses.

This carefully maintained separation collapses when his younger brother, Will, follows him through the portal. During an ambush by the Goyl—a race of subterranean warriors with skin...

For years, Jacob Reckless has used a mirror in his father’s abandoned study to escape into a world where the folklore of the Brothers Grimm is not mere fiction, but a visceral and often lethal reality. In this Mirrorworld, Jacob has built a reputation as a preeminent treasure hunter, a man who navigates the shifting alliances of fairies, dwarves, and emperors to retrieve enchanted artifacts. His life is defined by a sharp binary: the mundane grief of the modern world, where his father vanished and his mother withered away, and the adrenaline-fueled sanctuary behind the glass where he can be whoever he chooses.

This carefully maintained separation collapses when his younger brother, Will, follows him through the portal. During an ambush by the Goyl—a race of subterranean warriors with skin...