I've been researching the history of the classical world (i.e. Greek, Roman) for a screenplay. In addition to the history I've read, I've spent some time with the few remaining Greek dramas that are available. Here's some of the historical figures I've investigated:

• Caesarion
• Cleopatra Selene
• Alexander Helios
• Ptolemy Philadelphus

Does anyone have any recommended books on these figures?

Or other resources that I may not have visited on the Internet. I've read the Wikipedia pages and all the Wikipedia internal/external links, so any other resources would be helpful.