There are six essential points:
1. The theme of the book
When you decide the theme or genre of your book you are already deciding the success of your book to a large extent. You have to be very clear about what kind of book you want to write. If you want to know which genre is sold the most, it is as easy as going to the Amazon ranking. There are some genres that never go out of style.
2. Choose between fiction and non-fiction books
There is one that is more profitable than the other, and this is the non-fiction book. But if you are interested in writing a bestseller, you are more likely to do it with fiction books, but you are also more likely to fail.
3. The language
For your book to be sold, it must be written in a language that anyone with a minimum of culture can understand. Use simple language without technicalities or complicated and little-known words. You can express a lot with simple and straightforward language.
4. The structure
It is advisable to use the classic structure, as today's readers do not like complicated structures. The characters, which must be attractive and not have to be very complex, must have their own characteristics.
5. The title should attract attention
It should be memorable, original and a good synthesis of the work.
6. The cover
The cover is one of the most important topics. Usually it is done by the publisher, but if you decide to self-publish your book, you should take care of the cover yourself, if you don't hire someone to do it. It is a fundamental part of marketing.
One of the mistakes that writers who self-publish books make is that, instead of paying or making the covers themselves, they use the covers that Amazon offers you for free. The problem is that Amazon covers are used by many authors, therefore, it will not be original, they are, moreover, very simple and do not usually look good.
The title should be eye-catching and look good on all devices, also on mobile. The author's name should also look good. Other elements are the typeface and the colors of the letters. Make a well done back cover in which you can see the author's photo or not. On the cover you can also put a key phrase that can help.
But the most important part of the cover is the image. There are two types of images that can be used: paid ones and free ones. Images downloaded from Google should not be used as they may be copyrighted. It is highly recommended to contact a professional to help you if you do not have experience.
Listen to the content of the video to learn more about this topic.