Momentum, by Saci Lloyd

I LOVED both of the Carbon Diaries books, and had really high expectations for this one, but it felt like Lloyd, rather than keeping on writing visionary, very realistic near-future fiction, instead jumped on the far-out dystopian train, and fell off of it.
Splat. Much like the many falling parkourists through the book - and why the heck didn't she just call it parkour???? Like, people know what that is, Saci! You don't need to describe it at great length and then call it jumping.