Who has a book which they read because its a challenge? That they could put down and quite happily not go back to it, but a little voice says 'go on, read me!'?
I'm reading that type of book right now. The story is interesting (sort of), and I've tried to read it several times in the past. I'm half way through. It'll be great when I finish! It's not an edge of the seat type of read (not for me), but elements of it are really cool. And, once I finish, I can tackle the rest of my library books! Which will need renewing because I'm taking so long to read this mammoth work.