The Marvel Universe is massive. Marvel comics go back well over half a century, and span thousands upon thousands of pages. Reading all of them would be a Herculean undertaking. And one man, Douglas Wolk, did exactly that, and wrote a book about it. We talked his new release All of the Marvels, and about how one of the most well-known fictional universes in the world has dealt with real-world history, like war, civil rights, crime, AIDS, Watergate, and more.