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It's okay to publish a book at any age. If it is a good book (or at least good enough.) Worse come to worse, if you can't publish at age 13, you can try again at age 18 or age 23. A famous writer, Pearl S. Buck published her first book at age 10, I believe.
Luckily, itâs never been easier, so if youâre willing to learn and spend some money, you can give your book every chance at success. That said, the average author spends $2000 to $5000 to publish their books, and few authors earn any money. (Books get cheaper to publish the more you learn.