I have heard how Tim Ferris has used A/B testing to test headlines for his first book, and how he used the blogosphere to create groundswell for the 4-Hour Workweek. However, I just realized another strategy he used for 4-Hour Body.

It’s simple cross promotion. I write a post detailing how your product helped me write my book. He does this with two popular blogs/products, that I have seen. If anyone finds anymore, please let me know in the comments and I will add an update. See below:

Talk about I scratch your back, you scratch mine. I would love to know what measurable impact these ‘guest posts’ have had on his book sales (if he can even track that).

The posts are here and here.

Brilliant Tim. Brilliant!