A coordinated effort to buy an author's book on opening day so as to dramatically increase the author's chance of rising in the ranking system. The higher an author climbs in the ranking system, the more exposure they will get, thus increasing their overall sales of the book.
Example: "Hey OJD, today is Enola Gay's Book Bomb! Don't forget to buy her book "The Prepared Family Cookbook!"
by The Orange Jeep Dad August 26, 2013
An author who signs copies of their book at random whilst traveling across the globe.
That Chris Brogan just book bombed another Borders.
by Giannii April 12, 2010