"This is poor advice in my opinion for a few reasons: 1) You can only sell book rights piecemeal when you have leverage. You're Tina Fey or James Patterson? You can do what you want! But a first-time author with no audience? Holding back rights is very unrealistic. 2) None of the big publishers want a book that's already out. It is so so rare. It kills their sales and potential leverage in marketing and media." - Ben Parr