Emily St. John Mandel’s Sea of Tranquility is an elegantly told time travel mystery that takes us from the dark and beautiful woods of Vancouver Island to a dilapidated old city on the Moon — a lunar Toledo, according to Pagenerd Tommy. The Pagenerds follow some less-than-competent time detectives across eras and try to explain how time travel actually works using dinosaurs, toilets and movies Tommy’s grandma wouldn’t let him watch because of nipples.