Palagrin on "Viewing the root of a custom taxonomy"

Hi,

I've created a custom post type with a few custom taxonomies, for example "author". In this taxonomy I've then got the terms.

It's perfectly possible to view archive pages for the terms - example.com/author/term; but what I want to be able to do is see the root, as it where, of the taxonomy at example.com/author and see a list of all the terms in that particular taxonomy.

I've been hunting around and haven't found a way to do this - or am I missing something?

Thanks in advance.