This is a question I’m often asked, and it’s certainly not the same answer as how long a piece of string is! So, how long should your book actually be?
If we work backwards, from a production department point of view, a book of approximately 100,000 words will come in somewhere between 300 to 400 pages, largely depending on type size and page style. This is plenty for a typical author’s book, particularly a debut one. I’d suggest that 80,000 words up works well,