Well you got me interested in these stories and the author too.
Amazon Aus sells them but not Kobo Aus (or India).
My local library doesn't have his books, I haven't heard of him before (not that unusual) and am intrigued by what seems like a male following who may not be based in Aus.
Thanks for the thumbs up on this series Dr Drib
(PS I don't know if you also want to include a cheapish one in the
Historical Fiction thread in the Freebies sub forum)