The flavour of the day is book stuffing! Strap your seat-belts and let's take a ride through a land of no principles! I apologize in advance for I may or may not use puns and reference old movies...just because. #bookstuffingsucks#getloud
From the dawn of the times they came, offering bonuses and information on upcoming releases... I'm talking about back matter, not immortals. Traditional publishers have always included "bonus content" in the back matter.
Bonus content has always been identified as a preview of the next book in the same series of the author's next release, information about the author or even similar authors int he same imprint. Most of that content was often limited to 5% of the full book.