Choosing the right Sudoku puzzle: Market size and profitability of the Sudoku niche on KDP - Book Bolt

KDP offers a wide selection of puzzle types for shoppers to choose from. This availability of options enables sellers to diversify their portfolios and guarantee consistent sales. One of, if not the most popular puzzle type, is the Sudoku game. And it, too, has many variations. The Sudoku puzzle market on KDP can […]

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