Time to book hunt?

I know that my bookshelves are crammed, full, cracking under the weight of books. But most of them are books that I have read already and the few I did not I intend to read them...in due time. I guess what I mean to say is that I will need to purchase new books before Christmas. Of course there is also the local library, but I have exhausted most of its interesting titles for the time being. That means it is time to book hunting. It usually happens around this time of year if I don't want to run short.

My problem is where to go. This town has no proper bookstore. There are a few charity shops that sell them and a W.H. Smith that is, well, a typical W.H. Smith, therefore a glorified stationary shop. I usually like Waterstone's, but its bookshops are uneven and the ones that are in the nearest towns are not very good. I am tempted to go to Oxford or even London for one day and spend it book hunting. Book hunting is pretty much my favourite shopping activity, so I am looking forward to it. I just need to find the right time and find it soon.