The DRM-free "Masters of Doom" audiobook is currently (expires July 10-ish) included in the "Hackers, Gamers & Geeks" Humble Books Bundle for $15, along with a bunch of other video game history audiobooks, including "Prepare to Meet Thy Doom: And More True Gaming Stories" also by by David Kushner at the $8 level.
https://www.humblebundle.com/books/hackers-gamers-geeks-audi...