Taxonomy Term as Argument & Taxonomy Term as Field

Hi Earl

After a lot of searching, which is hard when your not exactly sure what your looking for i stumbled on #315530 which was close, but only covers part of my problem

I have a content type with several Vocabularies, though the two that concern me are "Author" and "Book Title"

I have a view that filters by content type, and "Author" vocab, my output field being the Taxonomy Terms for "Author" ( I have chosen this way rather than a Taxonomy View as I only want to return Authors where there are nodes of the specified content type.)
My plan is to Output as a link with the "Author" term the last part of the URL - This works nice and easy

Now, and this is where i am having problems.

I have a second view which uses the Author term from the above view as the argument, basically to filter the results to just the one author. The problem is though this view needs to output a list of "Taxonomy Term" from the "Book Title" as a field.
I tried a filter limiting to the "Book Title" vocab, but that seems to block the argument Taxonomy Term.
If i create a filter allowing both Vocabs, I get closer, but cant figure out how to tell the view which vocabulary to use for the Filed Taxonomy Term. At present i get results from both vocabularies

Can anyone tell me if this is possible or point me to what i need to be looking for

many thanks
John