Ordering things from England...?

Like fozzy23 says, it depends on weight - and which country it's going to. If the book costs the equivalent of 12 of your dollars I gather that you are not in North America (in Singapore, perhaps?). As the book costs only �5 it is not likely to be very heavy, but uming it weighs 1Kg (a little over 2 pounds) the airmail postage to North America or Singapore, for example, would be about �13, or say �15 including packaging. The UK will charge no duty, but I can't say whether your country will. You could save money by having it sent surface mail, but that way it wouldn't reach you until about the end of May!