Humorist Ryan North is the creator of Dinosaur Comics and the award-winning writer of Marvel's Unbeatable Squirrel Girl comic series. His new book, How to Invent Everything, is a survival guide for time travelers stranded in the past. The Time Machine by H.G. Wells (1895). Though not the first time-travel story, Wells' novel gave us the term "time machine." It's not my favorite book in terms of structure, but its ending — the time traveler prepares for a new journey, promises to return shortly, and then never does — still gives me chills. All Our Wrong Todays by Elan Mastai (2017). One of the great allures of time travel is the chance to go back and fix things, and this novel builds on that brilliantly: Someone from a utopia of jetpacks and flying cars goes back with the best intentions and accidentally makes things so much worse that the time line that results ...