Blue Adept by Piers Anthony

This compilation of texts primarily follows the adventures of Stile, a man from the scientifically advanced Proton frame, as he navigates the magical realm of Phaze, where he has assumed the identity of the Blue Adept. The narrative details his quest for vengeance against the Red Adept, who murdered his Phaze-self and his friend Hulk, and his journey to secure a future with the Lady Blue, the widow of his former self. Interspersed with his magical exploits and relationships with loyal companions like the unicorn Neysa and the sentient robot Sheen, are his competitive struggles in the Proton Tourney, where he strives to achieve Citizenship and uncover his mysterious enemy. The passages explore themes of parallel worlds, the interplay of magic and science, and personal growth through conflict and love.