First, a unique concept for the story is essential. You need to think about what makes your custom novel book different from others. Then, consider the setting, whether it's a fictional world or a real - life location. The dialogue in the book also plays an important role in bringing the characters to life.
One of the main elements is the target audience. Knowing who will read your custom novel book helps you decide on the theme, the complexity of the language, and the overall tone. For example, if it's for young adults, you might want to have a relatable protagonist facing contemporary issues. The pacing of the story is another factor. A good balance between action, dialogue, and description keeps the reader interested. Additionally, the cover design can attract readers, so it should be relevant to the content inside.