Literary Addicts Weekly Meme : When Do You Stop Reading?

I am forced to do the majority of my reading at nights due to the fact that I am quite busy in the daytime with work.  During this time I try to read as much as I possibly can, especially if I find what I am reading to be quite riveting. But then there comes a time when that pesky thing call sleep decides to interfere with my desire to read.  I do try to fight it at times but unfortunately it always triumph over my desire to finish especially when I am in the middle of a chapter.  So to answer the question, do you stop reading when tired or at chapter breaks? I would have to say it all depends on who wins the battle, sleep or me.