I am interested in writing a nonfiction book on social media. The book will be primarily practical advice based on my experience. However, I'm planning to personally interview some industry professionals to add their advice to the circle. I may even do Q&As with a few select people.
In journalism, it's no problem to use quotes from people. However, since this is a book, what are the rules or general practices concerning the content of an interview? Do I need to get them to sign a consent form? Do I need to pay the interview subjects?
Any advice is appreciated! Thank you!