I got sucked into this book hard. The concept of lock-in is equal parts fascinating and terrifying, and the book does a good job of exploring psychological/societal/political implications of lock-in on a large scale. The bonus novella Unlocked is not essential listening, but I enjoyed the extra backstory.

I've seen some recommendations to read Unlocked first, but I disagree. I know that I wouldn't have appreciated the extra backstory up front, and it probably would have been a bit too dry or slow if I wasn't already invested. So for what it's worth, I'd suggest reading Lock In and then digging into Unlocked if you still want more.