The Ring of Ritornel by Charles L. Harness

The story follows James Andrek, a brilliant young lawyer in the Great House of Oberon, ruler of twelve galaxies. Andrek is on a quest to find his brother, Omere, and uncover the mystery surrounding his father's death at the Node, the perilous birthplace of the universe. His journey delves into themes of fate, predestination, and the eternal struggle between opposing philosophies. Paperback, 1968 Goodreads: 3.68