Researching your book content.
As a author you can write about various topics and sometimes you may not have a lot of content on your chosen topic and that means you have to do a little research to find more content to cover the topic especially books that requires facts. This is why you often see chefs and travel writers doing a lot of research which includes asking specific questions, tasting various flavours, visiting lots of places etc. Whatever content you find make sure you reference it. I did research for my PLANTING FOR FOOD Book.