"Write a better book" 是一个常用的表达，意思是写出一本更好的书。

来源：这是一个比较常见的表达方式，通常用于建议或者指导别人写出一本更好的书。

一些英文例句及其中文翻译：

"If you want to improve your writing skills, try writing a better book." (如果你想提高写作技巧，尝试写出一本更好的书。)
"You have the potential to write a better book. Keep working at it and you'll see progress." (你有写出更好的书的潜力。继续努力，你会看到进步。)
"To write a better book, you need to research your topic thoroughly and plan out your story." (想写出更好的书，你需要彻底研究你的主题，并计划你的故事情节。)