articles and knowledge

A 98-page exploration of Hadrian's Wall — how Rome planned and built its northern frontier, life for the soldiers who guarded it, and its legacy in Britain. Here's what's inside, who it's for, and where to read it on Google Play Books.

An 82-page guide to the leaders, battles, achievements and cultural legacy of ancient Persia's empires. Here's what's inside, who it's for, and where to read it on Google Play Books.