The books I mentioned are not focussed on esoteric topics within Radiography, they are general texts that have been recommended to me by existing and past students as being particularly relevant. That said, I see no problem in actually possessing your own copy, especially as you are then able to make notes and annotations as necessary, rather than marking a library copy as some morons are prone to do.
I understand that some people have an attitude of antipathy towards pre-course reading, but where somebody has sought recommendations about suitable titles then they are clearly focussed on some form of preparation. Whether they loan or buy the book is their decision, I'm not encouraging anybody to spend money unnecessarily, just offering an opinion of what I have found useful.