Most of my books come from the Wal-mart i work at. They sell at a few %s under the printed price. I got Atlas Shrugged (which is a, i guess you could call it long form paperback, ie slightly taller then normal PBs) for $7.49 (before my employee discount of 10%, well, 4% since they charge 6% sales tax
), but the price printed on the book is $9.99.
But we have never carried a pratchett book, so i get them from books-a-million usually at $7.99 + tax. dunno what that is in pounds though. you can only find paperbacks here except when UA and ISWM were first released. and we get none of the illustrated books so i'm probably gonna have to import Eric and the last hero for those versions (and any other of the illustrated books)