I can actually count how many nights sleep Ive missed thanks to books! My e-reader keeps track of when youve read between certain hours(I think its between midnight and 5am, offhand) and my count is currently at 97. I love when I fall so in love with a story that Id rather feel like death warmed over the next morning and keep reading, than put the book down and get a good nights sleep. Thats the sign of a great writer, I think!
You all may laugh at my reply. Actually, whenever I am not getting sleep at night, I just have a book I will read a few pages and within minutes I get sleep. Really I could not complete reading this 400 pages book in nine years!