Tsk.
It's a trade off, though, isn't it - between getting cheaper books from companies who don't pay their way whilst accruing vast profits, or putting some extra money into the hands of smaller businesses who pay the tax they should and also contribute to their local economies.
COVID, and the various lockdowns we have had, have made me reappraise who and where I buy items from; I'm certainly leaning towards supporting smaller, local businesses wherever I can.