Choose a good title. It should be short, catchy, and informative. Often a subtitle can help to define or explain the contents. Provide an overview chapter that reviews the topic, explains its importance, and leads into the materials presented in the chapters. Insert tutorial chapters where and when appropriate.
Interdisciplinary topics are often good subjects for books.
Include papers from experts in several different areas that discuss the same topic. Consider adding appropriate material on chemical health and safety, on transportation of hazardous materials, etc. Include material on future perspectives. Secure outstanding authors for the book. Often the most notable authors are the most difficult from whom to secure a written paper, but important names in the field lend credibility to the book.