Harry Potter and the Methods of Rationality

Harry Potter and the Methods of Rationality is a Harry Potter rational fanfic by Eliezer Yudkowsky, AI researcher and decision theorist. The book is also available in audiobook version here.

This is an Alternate Universe story, where Petunia married a scientist. Now Rationalist!Harry enters the wizarding world armed with Enlightenment ideals and the experimental spirit.

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The Methods of Rationality

2: HJPEV and the Professor's Games

3: HJPEV and the Shadows of Death

4: HJG and the Phoenix's Call

5: HJPEV and the Last Enemy

6: HJPEV and the Philosopher's Stone