In 2015, Elon Musk reached out to blogger Tim Urban and asked him if he'd take a crack at explaining Elon's endeavors, and the industries surrounding them, to the world.
Tim accepted, and after extensive meetings with Elon and his staff, he wrote four blog posts that Vox’s David Roberts called “the meatiest, most fascinating, most satisfying posts I've read in ages.”
Here is the whole series, in one ebook.