Bartimaeus Sequence CYOA

From the introduction:

Since history began in the mud-brick cities of Mesopotamia more than five thousand years ago, rulers of great nations have always used magicians to help maintain their rule. The pharaohs of Egypt and the kings of Sumer, Assyria and Babylon all relied on magic to protect their cities,strengthen their armies and cast their enemies down. Modern governments, though cloaking the fact behind careful propaganda, continue this same policy.