The Isle of a Thousand Worlds - The Weirdwater Confluence, #2

An aging alchemist seeks the key to the Universal Tincture said to unlock the Thousand Worlds of the mind, but she never expected to solve the riddle of her hermetic heart. A meditation acolyte travels the mystical social media known as the Caravan and finds that the Thousand Worlds lie just below the surface, if she can only learn to see the space between the stars. This spicy romantic fantasy exploring the union of the physical and the metaphysical is book 2 of the Weirdwater Confluence duology.
It is the sequel to The Living Waters, but it could be read as a standalone. Author's note: this book contains explicit, consensual sex scenes between characters in their 60s and should not be read by anyone under the age of 18.