For UK, best place to purchase is on my website. US based people can also use the website, and will be posted from US distributor.

In the US, can also use CDBaby:
http://cdbaby.com/cd/pamelagivens


For digital downloads, there is also iTunes:
http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewAlbum?playListId=267452849

FYI - for artists, the least money comes back from a purchase on iTunes.