Note 1: If you can not open the downloaded file, and your Adobe Reader reports on the damaged file, then update your Adobe Reader. Because I have installed Adobe Reader 8.1.1 and ALL my uploaded files open fine in version 8.1.1.

Empires of Ancient Persia ISBN: 160413156X
Empire of Ancient Rome ISBN: 1604131594
Empire of Ancient Egypt ISBN: 1604131608
Empire of the Islamic World ISBN: 1604131616
Empire of Alexander the Great ISBN: 1604131624
Empire of the Mongols ISBN: 1604131632
Empires of Medieval West Africa: Ghana, Mali, and Songhay ISBN: 1604131640
Empire of Ancient Greece ISBN: 1604131659