Dominion is findable at virtually any friendly, neighborhood game store. Go visit yours and you'll be good to go.
Some books to read to get a much better appreciation of medieval Europe:
Norman Cantor. "Inventing the Middle Ages."
William Manchester. "A World Lit Only By Fire."
Barbara Tuchman. "A Distant Mirror."
On metacognition in education:
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Jon Cassie is at joncassie at gmail dot com.
Tracy Wazenegger is at tlwazenegger at gmail dot com.
Cover image from: [https://www.boardgamegeek.com/image/392195/dominion?size=large]