Reddit mentions of Human Physiology: From Cells to Systems

Tidy's Physiotherapy is a good general text.

As for other things you could do to prepare I would suggest:

a) Try and hone your musculoskeletal anatomy as sharp as possible, literally the more you know the easier your first year will be. Prioritise memorising the articulating bones and bony points, and muscles and their attachments and you will have a massive headstart on everyone else.

b) Similar for physiology - prioritise cardiovascular system, respiratory system, musculoskeletal, and CNS in broad terms.

The Physiotherapist's Pocket Book is a good resource for what kind of things to learn by rote - and lists a lot of very useful essential knowledge, but is designed for people who already know and just need reminding rather than learning from.

c) Dip into neurology a bit further and start familiarising yourself with some concepts, as this may be the area most different from exercise science. Basic neuroanatomy and reading about some common disorders (MS, CVA, Parkinsons).

d) Get used to palpation and generally being 'hands-on'. You will become very intimate with your fellow students - the quicker you lose any nerves the more you will get out of it.

e) Visit and shadow some physiotherapists if possible - creating a rapport with patients is half the job and you can learn a lot from observing, particularly body-language, patter, what questions to ask and how to frame them. Depending on your course you may not be going on placement in the first term, but the people skills needed are very difficult to learn from a book.

The most useful books other than the above for me were basic medical anatomy and physiology textbooks which you may know already. I used Tortora and Sherwood, but there are other similar and just as good. Instead of buying one of those tomes it may be better to browse a library for a more specific text when you need it, though.