Here are some various electronic links. Perhaps one or more will be of interest/use to you. I realize Radio Shack is a Yank firm, but I have seen them there in smaller towns outside London, so perhaps there is one near you. The ones here, at least, carry "basic" books, and if you can find one with a helpful/friendly staffer, you might become a PhD in a week!
Regards, and good luck! Jan Rowland, Old Ugly Yank with attitude.