"The ChronoGuard has shut itself down, and time travel is as it should be: technically, logically and theoretically…impossible." "Good thing, too," r… - Jasper Fforde

"The ChronoGuard has shut itself down, and time travel is as it should be: technically, logically and theoretically…impossible."
"Good thing, too," replied Landen. "It always made my head ache. In fact I was thinking of doing a self-help book for SF novelists eager to write about time travel. It would consist of a single word: Don't."