[paultopia]

Kreps, Game Theory and Economic Modeling has a nice overview and contextualization as I recall. I also really like Brian Skyrm's little books (Evolution of the Social Contract and Stag Hunt) for an introduction to the evolutionary side.

Note, those aren't textbooks. They're applied/context works with introductions, and I think they're better for developing intuition before getting into a textbook.

For a really accessible textbook that (as I recall) isn't as math-heavy as some others, Morrow, Game Theory for Political Scientists.