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"The 4-Hour Body: An Uncommon Guide to Rapid Fat-Loss, Incredible Sex, and Becoming Superhuman, a title he reverse-engineered from data he collected from the clickstream and Twitterverse."

Does anyone know how the above works?

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I remember him saying what he did for his previous book and I can imagine that for this one he did something similar. Basically, he came up with 10 or so possible titles (before having finished the book) and then used AdWords to check to which title customers respond.

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