Books 1–3 in 'Dragon's Oath', a series of fantasy novels by Donna Sundblad, now available in one volume!

Drake Ascendant: Young prison guard, Ervig Greenfields, seeks help from the dragons to lift a curse that has trapped him in the form of a dungeon rat. He's offered access to the Labyrinth of Times, but there's a catch: he must sweat an oath that binds him to the dragons as a Drake Ascendant, imbued with their power but never able to return to his own time. Soon, he must risk everything to confront the spirits of the Book Darkmore — and the evil forces that cursed him.

Shadowalkers: After Udoaver Greensleeves inherits the mysterious Cup of Epochs, he and his family steps into a new life and a web of ancient secrets. The cup’s glyphs reveal unfolding prophecies, connecting them to dragons and a destiny that could change everything. As they forge an alliance with the dragons against the Darkmore Evil, they must pay a price they never could have anticipated.

Sages of Tachnir: Leaving home to help the Sages of Tachnir, Udoaver Greensleeves has to travel through the Labyrinth of Times. Back home, his son Orin grows into a gifted Shadowalker, mastering his ability to move through time and discovering his purpose. As the Darkmore Evil threatens to destroy everything, allies must unite to stop it before history is forever changed.

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