When you get out of the stamp-budget hole I recently put you in, Philabooks has that series for about AUD$850, and Birken's new Volume 5: The Small Tughras for AUD$26.
budgeting, I am extremely good at, that was a very wonderful opportunity
you gave me, in securing those tomes.
Cracking Turkish philately is another thing, sometimes it seems just overwhelming. I am taking small bites at a time. (enjoyable though).
It will be a while, if ever, I tackle the Postmarks seriously.
Keen to get the Small Tughras.