From Techdirt:
We wrote recently about how an author and her lawyer appeared to be quite overaggressive in trying to enforce the trademark on the title of a book she had written.
[…]
Imagine, instead, if Susan Jeffers, rather than having her lawyer send a letter demanding credit, had simply emailed the author of the original blog post and said "Hey, this is a great blog post, and I've written this book you might be interested in, which even uses that same phrase you mentioned, 'feel the fear and do it anyway.' I'm sure you'd like the book, so let me send you a copy. Thanks!" Think what might have happened?
Techdirt suggests that the blogger might have been interested in the book, and might therefore have written about it in the future. For myself, though, any comment like that would be just as likely to end up in the spam box. Still, it’s worth a shot for an author trying to sell a book, surely.