My writing partner and I are nearly done with our second Harry Potter fic Ill Met by Moonlight which is a sequel to A Pound of Flesh. Not explicitly rationalist fic, but we've tried to write Riddle and Hermione smart.
One thing that's particularly fun about plotting with a partner is that we both want our character to win, (I write Hermione, he writes Riddle), so we only let the other person get away with a good trick when it delights us more as a reader than it hurts us to lose ground. Hope that pays off well for readers!
This is the monthly thread for posting media of various types that you've found that you enjoy. Post what you're reading, listening to, watching, and your opinion of it. Post recommendations to blogs. Post whatever media you feel like discussing! To see previous recommendations, check out the older threads.
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