Quote Originally Posted by Woody Sound
That's what I do for particularly hard single-note passages, or a difficult tune that I might be soloing on.

But it sounds to me like their leader lets the people take the books home with them. If so, that's very lucky. Not many bands do.
One of my bands has a book with 550 tunes, all handwritten. Take it home? I'm afraid to take it out of the box.