As a time traveler from the future you hope your time machine doesn't break down (it will), but if it does you definitely need this handy guide on how to make things a bit more comfortable for you. This guide teaches you everything from inventing language to growing food to making computers. It was fascinating to learn how long it took humanity to invent things we take for granted. It was also interesting to learn the technology ladders required for certain things. Thankfully, this is written with a great deal of humor, especially the footnotes. You can't skip the footnotes!