Altered Carbon has gotta be the best cyberpunk novel in a long time. Gritty, not too fantastical - it just nailed the genre perfectly.

I'm also enamored with The Culture. Not any particular story, really. Just the setting of post-scarcity + friendly AI. It's like an inverted Star Trek. Everyone is having a blast, and interference is pretty much a moral requirement. Apart from a sitcom set on some GSV, Special Circumstances provides all the setting necessary for tons of fun.

Both worlds would have ample opportunity for sex, drugs, nudity and violence. (Which is the only reason I bother watching Game if Thrones these days.)

Asimov's Robot books may also be prefect for HBO. Sorta like a hardboiled detective, except robot minds. (I enjoyed those a lot more than Foundation. While fun rides, the basic premise of predicting everything via psychology is just... eh, unrealistic.)