Q: How to write a research book

I am not sure what you mean by a research book. Are you referring to a thesis or an academic book? Or do you wish to know how you can get your researched published?

Generally speaking, if you are a master's or a PhD student, you would be required to write a thesis based on your research. This is usually a requirement of the university. However, if you have completed your PhD and have already embarked on a career as a researcher, you would be wanting to publish your research results in the form of an article in a reputable journal in your field. On the other hand, if you are an established researcher and have already published a few papers, you might want to contribute one or more chapters to an academic book. 

It would be difficult to provide a specific answer without understanding which of these three you wish to know about. However, here is an excellent resource that will help you understand how you can write a research paper and get published:

• The complete guide to writing a brilliant research paper

With over 50 articles and 7 video tutorials, it is a curated list that covers all aspects of writing a research paper, including ethical considerations, style and formatting guidelines, structure of the paper, and more.  

Here are some other resources that you might find helpful:

• 9 Differences between a thesis and a journal article
• Should I accept an invitation to publish my academic work as a book?