Books in the UK routinely ban lending in their copyright notice. I assume this means that in the UK, unlike the US, that is a valid thing to do. The text is pr

Books in the UK routinely ban lending in their copyright notice. I assume this means that in the UK, unlike the US, that is a valid thing to do. The text is probably just a holdover from the UK, or printed so that a single package can be sent to both the UK and US. In any case, I'm pretty sure the do-not-lend clause holds no power in the US and can be safely ignored.