The cost of an individual book depends on many factors, including the quality of the book, the method of publication, the publishing company, and so on. Generally speaking, if the book was self-created, the publishing fee would be higher. If you wanted to publish a book of higher quality, you might have to pay a higher fee. If the book is already in existence, you may have to pay a higher fee because you need to negotiate with the bookstore to reach a better price. When publishing a book of about 250,000 words, the usual fees include printing, publishing, publicity, and distribution. The specific fees may vary from one publishing company to another, so you will need to negotiate with multiple publishing companies to find the best one for your needs. The cost of publishing a book can be very high, so it is recommended to conduct sufficient market research to understand the target market and competitors and to develop a detailed publishing plan to ensure the best returns.