The Sudden Appearance of Hope by Claire North. I enjoyed her first one (under this name), The First Fifteen Lives of Harry August, so thought I’d try more. This had an interesting and well-developed premise but felt just a little too long.
Anathem by Neal Stephenson. I got food poisoning and couldn't do anything useful for two days, so I spent them re-reading this. I’ll probably re-read it again at some point.