Book excerpt: Come meet some of the world's biggest superheroes and villains and discover whether you have what it takes to be one in this exciting, interactive ebook by the curious minds at HowStuffWorks. You picked out your superpower years ago. You can change into your costume in seconds. You could take out a Sith Lord with your lightning-quick lightsaber moves. Not so fast! Before you can start vanquishing bad guys, it's important to be schooled in the science of saving the world. In Lightsabers, Batmobiles, and Kryptonite, the team at Discovery's award-winning website HowStuffWorks.com reveals the science behind your favorite superheroes and supervillains and their ultracool devices and weapons, from Batmobiles and warp speed to lightsabers, Death Stars, and kryptonite. This interactive ebook also explores other cool technologies from the science fiction realm such as liquid body armor, replicants, and invisibility cloaks. Discover: How Batman and the Batmobile really work 10 Star Trek technologies that actually came true If warp speed and lightsabers can really exist Whether Superman would win against Harry Potter, Sith Lords, and even Chuck Norris! How new liquid body armor can make us superhuman And more! Packed with podcast clips, interactive quizzes, videos, photos, and trivia tidbits, Lightsabers, Batmobiles, and Kryptonite will prepare you to do battle with the world's most evil masterminds.