The book is very academic, but highlights what seems to be a vital subject.
“To understand self-tracking and personal data as continuously emerging phenomena, we need to take a processual approach to the world, which understands them as part of the world, changing in and with it rather than as something that will impact on people and society as if separate from them.”
There are so many topics related to self-tracking: self-awareness, self-confidence, individual and collective evolution. It's an excellent topic to be studied further.