In pro wrestling, basically he's the one running the show. He decides who's winning the matches, how the matches
will end, and all the various storylines and feuds that lead to the matches taking place. Bookers can be all kinds of different
people, from the owner of the promotion (Paul Heyman in ECW), wrestlers for the promotion (Kevin Nash or Kevin Sullivan in WCW), or
people hired by the promotion for the job (Jim Cornette in Ring Of Honor). Booking can also be done by committee, the current bookers of the WWE are owner Vince McMahon, "head of creative" Stephaine McMahon-Levesque (
Vince's daughter), "head of talent development" Paul "Triple H" Levesque (semi-retired wrestler and Stephanie's husband), and various other
people. The term "book" can also be used as a verb, as in "I wish they'd book Daniel Bryan to actually win a match one of these days" or "WWE TLC
2012 was booked very well".