(3) Base Camp
Unwind is an easy read when it comes to word choice, and even if you do stumble over a few words, you won't get unwound, so at least that pressure is off. Without the threat of death (or whatever unwinding entails) looming over your shoulder, you can enjoy this fast-paced, suspenseful dystopian tale at your own pace.
The viewpoints change frequently, but all the chapters are clearly labeled. And the science-fiction lies more in the fantasy realm, with vaguely explained medical processes that you don't have to completely understand (we don't think you can if you tried) to get into the story.