For those rare times when a book is so compelling. You can literally do nothing else but read it. This is how I feel about a book I just started - Extremely Loud & Incredibly Close by Jonathan Safran Foer. It's brilliant. Written from the perspective of a little boy - one line I love so far (and I'm only on page 17!):
"She could tell that I was zipping up the sleeping bag of myself."
C'mon, boss. Introduce read-a-book day. I dare you.