Seabiscuit, Laura Hillenbrand's best-selling book about the rags-to-riches story of a 1930s Thoroughbred champion and the colorful people associated with him, is a finalist for the "William Hill Sports Book of the Year Award."The award, sponsored by the British betting company of the same name, will be announced Monday, Nov. 26. First place prize is £10,000, a free £1,000 bet, and a specially-bound copy of the subject book. Seabiscuit was published in the U.S. by Random House and in the United Kingdom by Fourth Estate Ltd. It is also being made into a movie.On all of the major best-selling book lists throughout the year, Seabiscuit has been responsible for garnering considerable publicity for horse racing and its author. Hillenbrand's meticulous research and writing skills have also drawn attention to ways in which she copes with chronic fatigue syndrome.Other finalists for the William Hill book award are two books about boxing, one about sailing, and one whose subject is football.