Hi and welcome to the forum.

The books and clothes you could easily send by post - though they may take a while. (Books often go at a special rate, but generally take 6 weeks or so to arrive.)

The large fragile pieces you may want to send by moving company, if only to have them pack them and provide insurance. If you feel confident enough to pack them yourself, try talking to an international freight company.
Cheers,
Bev