Tip - One of the most powerful forms of word-of-mouse content is the e-book

One of the most powerful forms of word-of-mouse content is the e-book.

David Meerman Scott provides a good read.

This is what others are saying about it:  “You’re not supposed to be able to do what David Meerman Scott is about to tell you in this book.”
– from the foreword by Robert Scoble, managing director of FastCompany.TV, co-author of Naked Conversations, and popular blogger at Scobleizer.com