
Time travel stories are tricky. The best ones give me a headache but not too much of a headache. I guess it’s the literary equivalent of the adrenaline rush one gets from momentarily being upside down on a roller coaster (which is definitely not for me): I want my brain to hurt as I contemplate 4-, 11-, or 22-dimensional spacetime … but I don’t want to get so confused that I feel the author could…