Dragons of Eternity - Margaret Weis - Bog

"When Destina Rosethorn and her companions were transported to a time centuries before their birth to the days of the Third Dragon War the Graygem of Gargath that Destina carries brought chaos to the battlefield and changed the course of history. Upon returning to the Inn of the Last Home where their journey began, Destina and her friends discover a world completely changed. The forces of evil hold sway over the land. The river of Time is rising, flowing inexorably towards present day. Destina and her friends have to make one last, desperate attempt to restore Time's river to its proper channel. If they do not succeed, the altered past will sweep over the present until no trace of their old world remains."--