I buy drm-free PDFs direct from authors whenever possible. Publishers second, other sources third. Realistically, this means I buy from Amazon often because th

I buy drm-free PDFs direct from authors whenever possible. Publishers second, other sources third. Realistically, this means I buy from Amazon often because there is no source for a DRM-free pdf. I am not happy with the kindle experience – if I am going to be giving up many of the freedoms (and the permanence) of a physical book, I want a bit more in return, for what is often the same price – or more in many cases (even more if used books are considered).