TD;DR: Buy this book. I devoured it in about three days.
If you're unfamiliar with the story of Silk Road and Ross Ulbrecht, think Breaking Bad but sub in a nice, quiet physics grad student for Walter White, and a darkweb contraband Amazon for Walter's blue sky meth.
This is a super compelling heart-of-darkeness journey with a true-crime tick-tock element that would make an amazing movie (please cast Robert Pattinson, who could be Ulbrecht's twin). Apparently there is a documentary out, if I find it I will update and link to it here.