The Lexicon Labyrinth: Imagine a mystical book that rearranges its contents every time it's opened, creating an infinite library in a single volume. The cover should be an ever-shifting mosaic of book spines, hinting at the multitude of works contained within. As pages are turned, words and illustrations flow and reform, transforming from one text to another. The margins could be filled with hyperlinks in the form of tiny portals, allowing readers to jump between related concepts across all of literature. Include a living table of contents that grows and prunes itself like a tree, and bookmarks that act as dimensional anchors, allowing a reader to return to a specific textual configuration. The paper should be shimmering and seemingly endless, with text in constantly shifting languages and scripts. Add a sentient index in the form of a wise, riddling sphinx that helps navigate the book's endless permutations.