I ran into similar problems trying to find a complete set of the Story of Civilization series; all the bookstores I checked only had one or two volumes (at most). I've had great luck, however, at used bookstores - I've found that they often have several copies of the series. Mine came from a used book sale. I think that you may also be able to find them on the internet, new or used. Either way, they're wonderful books and a great investment. Good luck!!
