KDP Direct – How to Make $36,000+ Selling KDP Puzzle Books (No Ads)
Five years ago, I ran an experiment to see if I could generate passive income by selling Sudoku puzzle books on KDP – with zero ads. Using Book Publisher Tools, I created and uploaded two variations of Sudoku puzzle books, the books created used low-competition, natural keyword-based titles – “Alphabet Sudoku” and “Wordoku – Cat […]
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