Deciding to stop reading a book is an art form in itself. I think many people never get into reading because they haven't found the right book for them and aren't willing to give up quickly enough when one doesn't click. Even I find it difficult, and I've stopped reading dozens of books. There are simply too many good books out there to spend time on ones you don't enjoy. The book in question was A Philosophy of Walking, by the way. It was just... so uninteresting.