The American Kennel Club has an extensive website with information on every AKC recognized breed, information on selecting and training puppies, upcoming dog shows and information on breed specific clubs
The Bedlington Terrier Club of America has an informative website with information on the history of the breed, grooming the Bedlington Terrier, a listing of breeders, upcoming shows and information on breed rescue
Information on Copper Toxicosis (CT) can be found at VetGen's website. Please do your research to ensure any puppy you decide upon is not affected with CT. There is an abundance of information on the VetGen site.
Although there have not been an abundance of books written on the breed, there are several that I recommend:
The Official Book of the Bedlington Terrier by Muriel Lee
The Bedlington Terrier, by Ken Bounden
The Bedlington Terrier, published by The Bedlington Terrier Club of America