You can learn a lot about the book you want to write by reading what other authors have already written in the same genre.
Books by other authors are not really your competition, because there’s plenty of room for more books, including yours.
Are you writing a historical novel that takes place in the 18th century? A cookbook on Asian cultures? A memoir based on the life of your grandmother? The story of your life?
Find similar books that have already been published and read them with a critical eye. Ask questions!
Why doesn’t it?
How long is the book? How many chapters?
Is that too long?
You can learn from what other authors have done right (and from what they’ve done wrong).
Not sure where to look? The world’s largest bibliographic resource is absolutely free and just a few clicks away: Amazon.com. Type in the title of a book in your genre, and then follow the links to “also recommended” books, book lists, reading lists, and more.
Read the reviews and find out what readers are buying, what they like, and what they don't like.
It's easy (and fun) research that will help you write your own best seller.
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"Books are the legacies that a great genius leaves to mankind, which are delivered down from generation to generation as presents to the posterity of those who are yet unborn" (Joseph Addison).