This is a difficult question to answer without knowing more about your book. Generally, you want your title to be catchy and reflective of the content of your book. For example, if your book is about a young girl's coming of age, a good title might be "Growing Up Gracefully." If your book is a mystery, a good title might be "Who Killed the King?"
There are a few things to keep in mind when choosing a title for your book. First, make sure the title is reflective of the content. You don't want a misleading title that will make readers disappointed. Second, try to make the title catchy and memorable. A good title will make people want to read your book. Finally, don't make the title too long. A title that is too long will be forgettable and may turn people off from reading your book.
If you're having trouble coming up with a title, try brainstorming with a friend or family member. Sometimes it helps to have someone else's input. You can also try looking at other books in your genre to get some inspiration.