Hola Maria,
Un par de opciones que ofrece el Diccionario Simon & Schuster's.
Buena suerte y saludos del Oso ¶:^)

--------------------------------------------------
Note added at 2005-10-23 03:00:04 (GMT)
--------------------------------------------------

También este otro Dicc.:

From the Diccionario Espasa Concise © 2000 Espasa Calpe:
bookmaker (nombre) corredor,-ora de apuestas

Y uno más:

book·mak·er
n.
2. One who accepts and pays off bets, as on a horserace. Also called bookie.

bookmaker
Meaning #2: a gambler who accepts and pays off bets (especially on horse races)
  Synonym: bookie

Español (Spanish)
n. - corredor de apuestas

The American Heritage® Dictionary of the English Language

From Wikipedia:

\"...A bookmaker, or a bookie, is an organisation or a person that takes bets and may pay winnings depending upon results and, depending on the nature of the bet, the odds. Bookmaking may be legal or illegal, and may be regulated; in the United Kingdom it was at times both regulated and illegal, in that licences were required but no debts arising from gambling could be enforced through the courts. Bookmaking is generally illegal in the United States, with Nevada being a notable exception. ...\"

http://www.answers.com/bookmaker&r=67