The Collaborative International Dictionary of English v.0.48:

Bookmaker \Book"mak`er\, n.
   1. One who writes and publishes books; especially, one who
      gathers his materials from other books; a compiler.
      [1913 Webster]

   2. (Horse Racing) A betting man who "makes a book." See To
      make a book, under Book, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

bookmaker
    n 1: a maker of books; someone who edits or publishes or binds
         books
    2: a gambler who accepts and pays off bets (especially on horse
       races) [syn: bookmaker, bookie]