Peel yourself off the space-time continuum and prevent a time-traveling lunatic from destroying the one TRUE timeline (you know, the one where people evolved from DINOSAURS). Visit prehistoric times, medieval Europe, the steampunk 1800s, and a moon base in 2271 (and potentially be stranded in any of them, if your decisions are particularly awful). Reach one of 76 possible endings, or get stuck in a time loop and literally read this book FOREVER.