Angel Barracks has announced a special offer for their A.G.S Black Powder rules.
From their announcement:
We are pleased to announce that there are now three A.G.S. scenarios available on our website. In order to celebrate the launch of what we hope will be a regular feature; we will be offering both the A5 A.G.S. rule book and Form Square! with free postage for a limited time in the UK and reduced shipping elsewhere.