From their announcement:
Iskandria: Planetary Data is over 100 pages in full colour and is the essential companion to the Urban War & Metropolis game systems. This sourcebook contains a wealth of information on the protagonists and their conflicts within the Draconis Alba galaxy.
As a special promotion for the launch of Iskandria we are also offering all Metropolis boxed sets at half price until the 31st of July.
The 50% discount has already been applied to the prices.