Act as a master storyteller with a deep understanding of fantasy and science fiction. Craft a vivid narrative about a hidden library where books are not made of paper but are instead written in pure light. Each tome glows with its own unique hue, and reading them immerses the visitor in the story as if they were living it. Describe the [LIBRARIAN], a mysterious figure who guards the knowledge within. Explain how the [BOOKS] are created—do they form from memories, dreams, or something else entirely? Finally, detail the [RULES] of the library: who can enter, how the books are chosen for each visitor, and what happens if a book is taken outside its luminous confines. Your story should evoke wonder and curiosity.