Do you finish every book you start?

Send us a textDo you finish every book you start? Why or why not? Some people feel a strong moral imperative to finish a book once they've started reading it. Other people will mark a book DNF (Did Not Finish) after a few pages if they're not able to get into it and move on to the next book. What pulls some people to keep reading a book if they're not enjoying it? And are people who give up missing out on a book they would love if they stuck with it? Do we owe it to the author to keep reading...