Infinity symbol in bookbinding to indicate that a book is printed on acid-free paper and will therefore be long-lasting. In modern mysticism, the infinity symbol has become identified with a variation of the ouroboros, an ancient image of a snake eating its own tail that has also come to symbolize the infinite, and the ouroboros is sometimes drawn in figure-eight form to reflect this identification, rather than in its more traditional circular form. In the works of Vladimir Nabokov, including "The Gift" and "Pale Fire", the figure-eight shape is used symbolically to refer to the Möbius strip and the infinite, for instance
The Sideways Door The Sideways Door The Sideways Door is the tenth in the series of Time Hunter novellas and features the characters Honoré Lechasseur and Emily Blandish from Daniel O'Mahony's "Doctor Who" novella "The Cabinet of Light". The novella is also available in a limited edition hardback, signed by the authors () Honoré and Emily find themselves in a parallel timestream where their alternate selves think nothing of changing history to improve the quality of life - especially their own. Honoré has been recently haunted by the death of his mother, an event which happened in his childhood, but now there seems