I'm having an extemely difficult time finding legal ways to obtain eBooks of The Broken Sword, The High Crusade, and Three Hearts and Three Lions in the U.S. The eBooks may be purchased in the U.K. or Australia, but not the U.S. Amazon.co.uk, for example, lists them but then says "Not for sale in your country."
Does anybody know the story behind this? I'm looking for eBooks because I have a medical condition where vision tends to vary, so a fixed-size printed text can be a drag for long-term reading. If you've found a legal channel for obtaining these eBooks in the U.S. then please let me know! Thanks.