: A research paper detailing how strategic considerations and military technology influenced castle construction throughout the Middle Ages. Educational Books & Series
There are a few different things you might be looking for under the title "Age of Castles." Depending on whether you're interested in a research paper, a book, or a game, here are the most likely matches: Age Of Castles
: A short nonfiction book by Michele Dufresne designed for reading levels around grade 6–8. Games : A research paper detailing how strategic considerations
: A more modern simulation/strategy game available on platforms like Steam and mobile. Paper Craft How to make a cardboard castle Paper Craft How to make a cardboard castle
(2005): This academic paper by Oliver J. T. O'Grady explores how the architecture and geography of castles in the Scottish Highlands reflected social changes and the birth of landed estates.