When The Empire Strikes Back first came out in 1980 and I saw Luke summon his lightsaber to his hand in the wampa cave, I remember thinking, Whoa! Awesome! And then, after I’d seen it maybe ten more times, I wondered, Where’d he learn how to do that? My nine-year-old self never suspected that one day I’d get the chance to provide the answer, and I’m grateful to Del Rey and Lucasfilm for making it happen.