From their annoncement:
It's here! After a few hiccups The Rise and Fall of Persia, the first source book for Clash of Empires, by Warren Gleeson and Mike Evans has arrived.
It's full colour, 192 pages, hardback, priced £20 (pounds sterling), and features army lists from the Rise of Persia under Cyrus to the death of Alexander.
Order your copy here: https://sites.google.com/site/clashofempires/products