My father and I just finished Moon-Flash by Patricia A. McKillip

My father and I just finished Moon-Flash by Patricia A. McKillip.
Though categorized as partly sci-fi, McKillip is incapable of writing anything other than a lyrical masterpiece in which the words flow like a river off the page, though your soul, and back again. Which is not unlike the story as Kyreol's incurably curious nature leads her beyond what the people of the Riverworld, her people, had thought to be the edge of the world but is instead only the first stage of a long journey. A journey with her best friend Terje down the river and across questions to find answers that, though often shocking, leads both into the sky and a better understanding of the world, each other, and their dreams.