I just noticed that Volume III of Mary Bergin's Whistle Tutor is finally available for purchase. The first two volumes were excellent and I've been waiting ages for this "Advanced to Professional" volume to come out.
Here is the link:
https://maryberginwhistle.com/purchase.html
Sorry if this was already announced somewhere and I missed it. I'm kind of surprised to have not seen an announcement of this, but I'm probably not the only one, and Mary's tutorials are treasure!
Oops! I meant to post this to the whistle forum. I'll try to delete it and post again over there.