Hi Antonio,
Here's my advise for prep before 1st year: if you can, try to do a bit of shadowing with a local practise. Even a day or two might should help you get an idea of exactly what you might be doing with the new skills you will be learning.
The theory you learn will come much easier once you are in class where it has more context. If you really want to read something, have a look at some anatomy - bones and muscles at first. It looks like book lists will be published from the end of June on the Saxion website, check there in a few weeks to see if any of those look interesting and take your pick!
Hope that helps,
Sam