(n) :
a collection of sheets of paper bound together to hinge at one edge, containing printed or written material, pictures, etc. If initially blank, commonly referred to as a notebook; a record of betting (from the use of a notebook to record what each person has bet)
"I'm running a book on who is going to win the race."
(v) :
to reserve (something) for future use; to penalise (someone) for an offence