Does anyone know much about this?

I'm trying to figure out how differences in copyright law in different parts of the world apply to global digital publication.

For Example, Aldous Huxley's Brave New World. Written in 1932, he died in 1962. In the US it should not be out of copyright (post-1923) and yet I have seen websites claiming that it entered the public domain in 2008. In the UK and most other countries it should still be under copyright until 2032 (70 years after Huxley's death). In australia it is out of copyright (+50 years since Huxley's death).

There's an australian audiobook production of Brave New World available anywhere in the world. Does this infringe copyright (e.g in the US or UK)?

On project gutenburg there are free copies of some of Huxleys earlier works which again anyone in the world can download for free. Does this infringe copyright (in th UK for example)?

Any advice? Thanks