The Rationalwiki entry (that I think you might have written?) is already such a good entry-level overview of such a (literally) hostile topic. Hm. Other than expanding on everything covered there, I think such a book should include a more detailed history of Yudkowksy himself, and LessWrong's roots and offshoots, and how this all arises out of Yudkoswky's personal idiosyncratic weirdness. Do we know anything much about Roko themselves? I'm sure they never want to talk or think about this ever again, but shedding any light on how Roko connected up these ideas (even if you were tracing their posting history) would be extremely interesting. I think that horror-story aspect of the book would be very appealing, especially to those not already familiar with the topic.

Something I'd really like to see covered is something El Sandifer mentioned on Twitter ages ago, which is how *scarily* influential Yudkowsky has been in Silicon Valley thinking ("thinking") on this subject, and if you're going to drop your napalm snark on anything the ways in which LessWrong-y fantastical nightmares are actively overshadowing the real harm of AI being done right now with regards to bias and discrimination would be one of your most on-point targets. Really just go to town on how hard MIRI fucked up everything they ever set out to do.

— Evan