The concluding scene in which
spoiler
Cassie actually goes through with the surgery at having a bit of a breakdown
was maybe the most stressful thing I had ever read up to that point.
I had read a more dramatic events in other books, but I knew the gang so well that it was extremely harrowing seeing Cassie make this decision.
For sure, i remember that line specifically tripping me up each time I read 29.5 despite the alternate-universe setting.
The only thing I ask with this community is that since people are still coming to the series for the first time and finishing it for the first time(literally just had another new finisher pop in last month suggesting a podcast, Nevermorphed, hosted by a first-time reader), try to keep post titles/images spoiler -free and mark revealing body posts and comments with spoiler tags.