Allen L. Wold
This book can be downloaded and read in Apple Books on your Mac or iOS device.
The time has come for Jeanette to confront the Enemy at last. But before she can reach him, she must defeat Diapollion the Ecliptor, the Enemy's prime agent, and master of the Arkenomes who destroy cultures and whole worlds.
The Enemy is a transcendent being, an extra-cosmic intelligence, who dwells outside the greater reality. She must discover how to cross the threshold between all that is real, and the meta-reality where Kada Barros has his place of power. Kada Barros strikes, and she loses everything. Tondorre, her soul companion, comes to her, and gives her the black ring, which she had entrusted to him, but all her other companions have been scattered to their own worlds. She must start all over again, with only the ring and Tondorre to help her.
She saves one world, and another, but she falls into a trap set by an Arknome who bested her once before. She and Tondorre are saved from death by a companion who came from her own world, in response to Jeanette's need for help. She has two companions now. She is challenged by the new Ecliptor, someone whom she had thought she had overcome, and this time she destroys his power.
But she learns that the intelligences, which have been watching over everything, will not let her finish the task which had been set before her. Instead, she must choose another hero to take her place.