I know the feeling!!!

What was the last book that kept you up all night?

Mine was the Poison Study - Maria V. Snyder .I started reading it on the bus on my way home from work (and mind you it was a loong shift I had pulled off that day) at 11.00 pm. The next time I looked up with some breaks to eat/shower (it was after work) the clock was reading 5.50 am.