When to stop reading?

So I faced a dilemma about a week or so ago. I had finished reading “The Last Tudor” by Philippa Gregory (you can read my review of it here.) and began a new book: “Origin” by Dan Brown. I have read all of his books, so naturally, I needed to read this one as well.

I began reading it, and about three chapters in I stopped. My issue with the book was that there was a lot of Spanish in it without any translation. Of course, some of it can be guessed at by looking at the context, but not all of it. I was sad because I really wanted to get into this book. After going to another book in my collection, I decided that I should continue reading “Origin,” mostly because I know the book has to be good. My persistence paid off, as more of the foreign language sections were translated the further I went into the book.

While I am glad that I continued reading (and still am reading), it made me wonder: At what point do you stop reading a book? This is nowhere near the first time I’ve stopped a book. I had to re-read “The Constant Princess” by Philippa Gregory because I had given up on it the first time. I still have not finished her book “The Other Queen,” mostly because my mind kept trying to compare the story with the TV show “Reign,” both being about Mary, Queen of Scots. I’ve also stopped reading the “Outlander” series by Diana Gabaldon because it became boring to me.

I hate not finishing a book. I want to know everything that happens in a book, and I want the satisfaction that I completed my task. However, there’s just a point where you have to say that you can’t continue. For me, it’s often that I get bored. When I get bored, I skip paragraphs, then I miss things. One of these days I’ll finish reading these books, but for now, I continue on with “Origin.”

So I wanna know from you guys: At what point do you give up on a book?