The most highlighted sentence from the Kindle version of The Start-Up of You is:
The fastest way to change yourself is to hang out with people who are already the way you want to be.
I did have a feeling that sentence was a winner when we wrote the book, but in the electronic age it’s interesting to be able to see data around it.
I should note that there is a rich-get-richer effect with highlights on the Kindle. Unless you turn it off, as a reader you begin to automatically see flags on the sentences that other readers have most underlined. This no doubt influences you to highlight the same.